Measuring-ring element for a measuring system for a micromobility vehicle, measuring system, and micromobility vehicle

Abstract

Disclosed is a measuring-ring element (2) for a measuring system (5) for a micromobility vehicle (1) for determining a rotational speed of a wheel (3) of the micromobility vehicle (1), wherein the measuring-ring element (2) is designed to be arranged on the wheel (3) of the micromobility vehicle (1) and has a plurality of spaced-apart signal transmitters (6, 6a). Each signal transmitter (6, 6a) defines a signal path (7) with a signal-path length, and the signal transmitters (6, 6a) are arranged radially around a central axis (M) of the measuring-ring element (2). The measuring-ring element (2) has a calibrating element (8), wherein the calibrating element (8) is formed as a material-free cut-out in the measuring-ring element (2) and wherein the calibrating element (8) is arranged between two signal transmitters (6a). A measuring system (5) and a micromobility vehicle (1) are also proposed.

Description

[0001]Measuring ring element for a measuring system for a micromobility vehicle, measuring system and micromobility vehicle The present invention relates to a measuring ring element for a measuring system for a micromobility vehicle, a measuring system and a micromobility vehicle. In the field of micromobility vehicles, it is necessary to determine the rotational speed of a wheel of such vehicles in order to be able to deduce the speed of the vehicle. Measuring systems used for this purpose should have tamper protection so that tampering with the permissible maximum speed of the respective micromobility vehicle is made more difficult. EP 3590812 A1 discloses an incremental measuring path system for a bicycle with tamper protection for determining a rotational speed of a wheel of the bicycle relative to a fixed point on the bicycle.Based on the prior art, the present invention is based on the object of proposing an alternative to the measuring system known in the prior art. Based on the aforementioned object, the present invention proposes a measuring ring element for a measuring system for a micromobility vehicle with the features of claim 1, a measuring system with the features of claim 6, and a micromobility vehicle with the features of claim 7. Further advantageous embodiments and developments emerge from the subclaims. A measuring ring element for a measuring system for a micromobility vehicle for determining a rotational speed of a wheel of the micromobility vehicle has a plurality of spaced-apart signal transmitters. The measuring ring element is designed to be arranged on the wheel of the micromobility vehicle.Each signal generator defines a signal path with a signal path length. The signal generators are arranged radially around a central axis of the measuring ring element. The measuring ring element has a calibration element, whereby the calibration element is formed as a material-free recess in the measuring ring element, whereby the calibration element is arranged between two signal generators. "Micromobility vehicle" here refers to a motorized or non-motorized small and light vehicle that is characterized by its compact and lightweight design and is primarily designed for individual passenger transport. In particular, micromobility vehicles include vehicles with electric drive or auxiliary drive, such as e-bikes, pedelecs, S-pedelecs, velomobiles, cargo bikes, e-scooters, Segways, etc. Micromobility vehicles can be single-track, two-track, or multi-track vehicles.When used in a preferably incremental measuring system of a micromobility vehicle, the measuring ring element can be arranged coaxially to the rotational axis of the wheel whose rotational speed is to be determined, so that the wheel rotates with the wheel. The measuring ring element has a carrier element, which can be made of, for example, metallic material, a plastic material, a fiber-reinforced plastic composite material, or another suitable material. The carrier element and thus the measuring ring element is shaped as a full circular ring or as a ring segment, i.e., as an incomplete circular ring that has a gap. The carrier element carries the signal transmitter and has the calibration element.The signal transmitters and the calibration element are arranged radially around the central axis, wherein the central axis is defined by a rotation axis of the wheel when the measuring ring element is used in a measuring system of a micromobility vehicle. For example, the signal transmitters can be arranged largely rotationally symmetrically around the central axis. The signal transmitters are, for example, raised relative to the support element, i.e. the support element defines a plane on which the signal transmitters are arranged, so that they protrude beyond this plane. Alternatively, the signal transmitters are recessed into the support element, so that the signal transmitters do not protrude beyond the plane defined by the support element. With the exception of the two signal transmitters, all signal transmitters are preferably arranged equidistant from one another. The distances between the individual signal transmitters are uniform.Only the distance between the two signal transmitters, between which the calibration element is arranged, differs from the other distances. This ensures that rotation of the wheel of the micromobility vehicle can be easily detected. Each signal transmitter has and defines a signal path. Each signal path is in the form of a circular segment and has a signal path length. The signal path length directly influences the resolution of the sensor signal, which is caused by tapping the signal path. Each signal transmitter is preferably made of a magnetic material. Alternatively, each signal transmitter can be made of a non-magnetic material. The signal path of the individual signal transmitters can be tapped using a sensor element if the measuring ring element is used in a measuring system of a micromobility vehicle.The sensor element can be designed, for example, as a magnetic, inductive, capacitive, or optical sensor, a Hall sensor, or an ultrasonic sensor. Overall, the sensor element and the signal generators must be selected so that they are compatible with each other, so that the sensor element can detect the signal generators and tap the signal paths; for example, a Hall sensor is compatible with a signal generator made of magnetic material. The calibration element is formed as a material-free recess in the measuring ring element, with the calibration element arranged between two signal generators. The calibration element is designed, for example, as a window or gap in the support element of the measuring ring element. For example, the calibration element can be shaped as the gap if the measuring ring element is designed as a ring segment. In other words, the calibration element is formed by the absence of at least one signal generator.The calibration element preferably has the same radial distance from the central axis as the signal transmitters. The calibration element has a calibration section that is in the shape of a circular segment and has a calibration section length. In other words, the calibration section is a "non-signal section" because it is defined due to the absence of at least one signal transmitter. If, when the measuring ring element is used in a measuring system of a micromobility vehicle, the signal sections of the signal transmitters are tapped using the sensor element during the rotation of the wheel, the calibration section is also detected by the sensor element. Based on the tapped signal sections, the rotational speed of the wheel can be deduced. Based on the detected calibration section, the actual rotational speed of the wheel can be deduced.During a complete rotation of the wheel of the micromobility vehicle – and thus during a complete rotation of the measuring ring element – ​​the calibration element passes the sensor element exactly once. This makes it possible to determine an actual full rotation of the wheel. Manipulation of the measurement signal and / or incorrect transmission of the measurement signal can thus be counteracted. According to a further embodiment, the calibration element defines a calibration section with a calibration section length that differs from the signal section lengths of the individual signal transmitters. This ensures that the calibration element can be reliably detected. Incorrect detection of a gap between two signal transmitters as a calibration element can thus be prevented.For example, the calibration element can have a calibration section with a calibration section length that is twice or three times as long as the signal section length of the respective signal sections of the signal transmitters. The calibration element would therefore, for example, have a "non-signal section" three times as long as the calibration section length. According to a further embodiment, the signal transmitters are all designed to be uniform to one another. All signal transmitters therefore have the same dimensions and are made of the same material. This ensures that rotation of the wheel of the micromobility vehicle can be easily detected. This is also advantageous during manufacture of the measuring ring element, as the number of identical parts is increased. According to a further embodiment, the positions of the signal transmitters and the calibration element on the measuring ring element are subject to an irregular angular division over a circumference of the measuring ring element.The angular pitch therefore does not correspond to 360° / number of elements. In contrast to an exact angular pitch, which corresponds to 360° / number of elements, it is thus possible to design the calibration section length as desired and independently of the signal path lengths of the respective signal paths of the signal transmitters. The irregular angular pitch makes it possible to vary the size deviation of the calibration element more significantly. Therefore, no major jumps in the calibration section length have to be accepted during product design. This allows the resolution of the sensor signal to be selected as required. A measuring system for a micromobility vehicle for determining the rotational speed of a wheel of the micromobility vehicle has the sensor element, which is configured to be fixed to a stationary component of the micromobility vehicle.The measuring system additionally comprises the measuring ring element, which can be arranged on the wheel of the micromobility vehicle so that the measuring ring element rotates with the wheel. The sensor element is additionally configured to output a sensor signal upon rotation of the wheel, based on scanning the signal paths of the signal transmitters and the calibration path of the calibration element of the measuring ring element. The sensor element and the measuring ring element have already been described in the previous description. The measuring system is designed as an incremental measuring system. When the measuring system is used in a micromobility vehicle, the sensor element is fixed to a stationary component of the micromobility vehicle. The stationary component does not participate in the rotational movement of the wheel of the micromobility vehicle.The stationary component can, for example, be designed as a body, a fork, a frame, or another suitable component of the micromobility vehicle. The stationary component should be selected such that the sensor element can be attached in such a way that it can unhindered detect the signal generators and the calibration element during the rotation of the wheel. The sensor element generates a sensor signal that can be tapped at the sensor element. The sensor signal can then be evaluated, for example, using an evaluation device of a control unit of the micromobility vehicle. The sensor signal is generated when the measuring ring element rotates with the wheel of the micromobility vehicle and the signal generators and the calibration element rotate past the sensor element, resulting in an interaction between the sensor element, the signal generators, and the calibration element.A micromobility vehicle with at least one wheel has the measuring system already described in the previous description. The measuring ring element is arranged on the wheel so that the measuring ring element rotates with the wheel. The sensor element is fixed to a stationary component of the micromobility vehicle so that the signal paths of the signal transmitters and the calibration path of the calibration element of the measuring ring element can be scanned using the sensor element. The scanning of the signal paths and the calibration path only occurs when the wheel, and thus also the measuring ring element, is rotating. This was already described in the previous description. Various exemplary embodiments and details of the invention are described in more detail with reference to the figures explained below. They show, by way of example: Fig. 1 shows a schematic representation of a micromobility vehicle with a measuring system according to an exemplary embodiment, Fig.2 shows a schematic representation of a measuring ring element according to one exemplary embodiment, Fig. 3 shows a schematic representation of a measuring ring element according to a further exemplary embodiment, Fig. 4 shows a schematic representation of a measuring ring element according to a further exemplary embodiment, Fig. 5 shows a schematic representation of a measuring ring element according to a further exemplary embodiment. Fig. 1 shows a schematic representation of a micromobility vehicle 1 with a measuring system 5 according to an exemplary embodiment. The micromobility vehicle 1 is shown here as an (S-)Pedelec by way of example. Alternatively, the micromobility vehicle 1 can be designed as an e-bike, velomobile, cargo bike, e-scooter, Segway, or as another micromobility vehicle. The micromobility vehicle 1 has two wheels 3 and a stationary component 10, e.g. a fork. The measuring system 5 is arranged in the area of ​​the front wheel 3.The measuring system 5 can of course also be arranged on the rear wheel as an alternative. The measuring system 5 is designed as an incremental measuring system 5. The measuring system 5 has a measuring ring element 2 and a sensor element 4 compatible with the measuring ring element 2. The measuring ring element 2 is preferably shaped according to one of the exemplary embodiments from Figures 2 to 5. The measuring ring element 2 is arranged on the front wheel 3 of the micromobility vehicle 1 so that it rotates with the wheel 3. The measuring ring element 2 is attached to the wheel axle of the front wheel 3, wherein the wheel axle runs coaxially to a central axis M of the measuring ring element 2. The sensor element 4 is fixed to the fork of the micromobility vehicle 1, wherein the fork represents a stationary component 10 of the micromobility vehicle 1. If wheel 3 now rotates around the axis, measuring ring element 2 performs the same rotational movement. The measuring ring element 2 rotates past the sensor element 4.The sensor element 4 detects the signal transmitters 6, 6a and the calibration element 8, which the measuring ring element 2 has. The sensor element 4 taps the signal paths 7 and the calibration path 9. Based on this, the sensor element 4 generates a sensor signal, which can be forwarded, for example, to a control unit of the micromobility vehicle 1. The generated sensor signal can be used to determine the actual rotational speed of the wheel 3. Fig. 2 shows a schematic representation of a measuring ring element 2 according to an exemplary embodiment. The measuring ring element 2 is designed as a circular ring and has a carrier element 11, which carries a plurality of signal transmitters 6, 6a and has the calibration element 8. For better clarity, only three signal transmitters are provided with reference numerals. All signal transmitters 6, 6a are designed identically to one another.The calibration element 8 is arranged between two signal transmitters 6a and is delimited by them in the radial direction. All signal transmitters 6, except for the two signal transmitters 6a between which the calibration element 8 is arranged, are arranged equidistant from one another, with a material-free gap 12 arranged between every two of these signal transmitters 6. The gaps 12 are all shaped uniformly to one another. The gaps 12 are shaped as windows here, which is advantageous with regard to the mass of the measuring ring element. The calibration element 8 and the signal transmitters 6, 6a are arranged on the support element 11 radially around the central axis M. The signal transmitters 6, 6a are arranged largely rotationally symmetrically to the central axis M. The measuring ring element 2 has a total of 23 signal transmitters 6, 6a. Each of the signal transmitters 6, 6a has a signal path 7 that has a certain signal path length.The signal paths 7 of all signal transmitters 6, 6a have the same signal path length. For example, the signal path length can be as long as the radial distance between two signal transmitters 6 between which no calibration element is arranged. The signal transmitters 6, 6a are preferably formed from a magnetic material. The calibration element 8 has a calibration path 9 that has a calibration path length. The calibration path length is longer than a single signal path length. Here, the calibration path length is as long as the sum of a signal path length and two distances between two signal transmitters. The calibration element 8 is formed as a material-free recess, namely as a window, in the carrier element 11. In other words, the calibration element 8 replaces a signal transmitter 6 including two intermediate spaces 12. In other words, the calibration path 9 represents a "non-signal path."The positions of the signal transmitters 6, 6a and the calibration element 8 are subject to a regular angular division over the circumference of the measuring ring element 2. This angular division is: 360° / (number of signal transmitters + number of signal transmitters replaced by the calibration element). The angular division is therefore α = 360° / 24 = 15°. This means that each signal transmitter 6, 6a is offset by 15° from the previous signal transmitter 6, 6a, with the exception of the two signal transmitters 6a between which the calibration element 8 is located. The calibration element 8 is arranged directly adjacent to its leading or trailing signal transmitter 6a. Fig. 3 shows a schematic representation of a measuring ring element 2 according to a further embodiment. In principle, the shape of the measuring ring element 2 is very similar to the measuring ring element 2 from Fig. 2. The only difference is the number and arrangement of the signal transmitters 6, 6a and the shape of the calibration element 8. With the device shown in Fig.With the shape of the measuring ring element 3 shown in Figure 3, a higher resolution is achieved for the sensor signal to be generated. The measuring ring element 2 has a total of 55 signal transmitters 6, 6a. Each of the signal transmitters 6, 6a has a signal path 7 which has a certain signal path length. The signal paths 7 of all signal transmitters 6, 6a have the same signal path length. For example, the signal path length can be as long as the radial distance, i.e. the gap 12, between two signal transmitters 6 between which no calibration element is arranged. The signal transmitters 6, 6a are preferably formed from a magnetic material. The calibration element 8 has a calibration path 9 which has a calibration path length. The calibration path length is longer than a single signal path length. Here, the calibration path length is as long as the sum of a signal path length and two distances between two signal transmitters.The calibration element 8 is formed as a material-free recess, namely as a window, in the support element 11. In other words, the calibration element 8 replaces a signal transmitter 6 including two intermediate spaces 12. In other words, the calibration section 9 represents a "non-signal section." The positions of the signal transmitters 6, 6a and the calibration element 8 are subject to a regular angular division over the circumference of the measuring ring element 2. This angular division is: 360° / (number of signal transmitters + number of signal transmitters replaced by the calibration element). The angular division is thus α = 360° / 56 = 6.43°. This means that each signal transmitter 6, 6a is offset by 6.43° from the previous signal transmitter 6, 6a, with the exception of the two signal transmitters 6a between which the calibration element 8 is located. The calibration element 8 is arranged directly adjacent to its leading or trailing signal generator 6a. Fig.4 shows a schematic representation of a measuring ring element 2 according to a further embodiment. In principle, the shape of the measuring ring element 2 is very similar to the measuring ring element 2 from FIGS. 2 and 3. The only difference is the number and arrangement of the signal generators 6, 6a and the shape of the calibration element 8. With the shape of the measuring ring element 3 shown in FIG. 4, a higher resolution is achieved for the sensor signal to be generated. The measuring ring element 2 has a total of 55 signal generators 6, 6a. Each of the signal generators 6, 6a has a signal path 7 which has a certain signal path length. The signal paths 7 of all signal generators 6, 6a have the same signal path length. The signal generators 6, 6a are preferably formed from a magnetic material. The calibration element 8 has a calibration path 9 which has a calibration path length.The calibration section length is longer than a single signal section length. Here, the calibration section length is as long as the sum of a signal section length and two distances between two signal transmitters. The calibration element 8 is formed as a material-free recess, namely as a window, in the support element 11. In other words, the calibration element 8 replaces a signal transmitter 6 including an intermediate space 12. In other words, the calibration section 9 represents a "non-signal section". The positions of the signal transmitters 6, 6a and the calibration element 8 are subject to an irregular angular division over the circumference of the measuring ring element 2. The angular division here is α = 6.5°. This means that each signal transmitter 6, 6a is offset by 6.5° from the previous signal transmitter 6, 6a, with the exception of the two signal transmitters 6a between which the calibration element 8 is located.The calibration element 8 is arranged directly adjacent to its leading or trailing signal generator 6a. The irregular angular pitch makes it possible for the calibration section length of the calibration section 9 to be designed as desired and independently of the signal section lengths of the respective signal sections 7 of the signal generators 6, 6a. The irregular angular pitch thus makes it possible to vary the size deviation of the calibration element 8 to a greater extent. Fig. 5 shows a schematic representation of a measuring ring element 2 according to a further exemplary embodiment. In principle, the shape of the measuring ring element 2 is very similar to the measuring ring element 2 in Fig. 3. The signal generators 6, 6a, the number of signal generators 6, 6a, the arrangement of the signal generators 6, 6a, the signal section lengths, the calibration section length and the regular angular pitch are designed in the same way as in Fig. 3.The only difference is the shape of the calibration element 8 and the shape of the carrier element 11. The carrier element 11, and thus the entire measuring ring element 2, is shaped as a ring segment. The calibration element 8 is formed as a material-free recess, namely as a gap, in the carrier element 11. The calibration element 8 has the calibration section 9, which has the calibration section length. The calibration section length corresponds to the calibration section length shown in Fig. 3. The examples shown here are only examples. The angular pitch, the number of signal transmitters, the signal section lengths of the signal transmitters, and the calibration section length of the calibration section of the calibration element can be adjusted as needed and the desired resolution.Reference numeral 1 micromobility vehicle 2 measuring ring element 3 wheel 4 sensor element 5 measuring system 6 signal generator 6a signal generator 7 signal section 8 calibration element 9 calibration section 10 stationary component 11 support element 12 gap M central axis α angle.

Claims

Claims 1. Measuring ring element (2) for a measuring system (5) for a micromobility vehicle (1) for determining a rotational speed of a wheel (3) of the micromobility vehicle (1), wherein the measuring ring element (2) is configured to be arranged on the wheel (3) of the micromobility vehicle (1), wherein the measuring ring element (2) has a plurality of spaced-apart signal transmitters (6, 6a), wherein each signal transmitter (6, 6a) defines a signal path (7) with a signal path length, wherein the signal transmitters (6, 6a) are arranged radially around a central axis (M) of the measuring ring element (2), wherein the measuring ring element (2) has a calibration element (8), characterized in that the calibration element (8) is formed as a material-free recess of the measuring ring element (2), wherein the calibration element (8) is arranged between two signal transmitters (6a). 2.

1. Measuring ring element (2) according to claim 1, characterized in that the measuring ring element (2) is designed as a circular ring or as a ring segment.

3. Measuring ring element (2) according to any one of the preceding claims, characterized in that the calibration element (8) defines a calibration section (9) having a calibration section length that differs from the signal section lengths of the individual signal transmitters (6, 6a).

4. Measuring ring element (2) according to any one of the preceding claims, characterized in that the signal transmitters (6, 6a) are uniform with respect to each other.

5. Measuring ring element (2) according to any one of the preceding claims, characterized in that the positions of the signal transmitters (6, 6a) and the calibration element (8) on the measuring ring element (2) are subject to an irregular angular division over a circumference of the measuring ring element (2). 6.Measuring system (5) for a micromobility vehicle (1) for determining a rotational speed of a wheel (3) of the micromobility vehicle (1), wherein the measuring system (5) has a sensor element (4) which is configured to be attached to a. The measuring system (5) is fixed to the stationary component (10) of the micromobility vehicle (1), characterized in that the measuring system (5) additionally comprises a measuring ring element (2) according to one of the preceding claims, which can be arranged on the wheel (3) of the micromobility vehicle (1) so that the measuring ring element (2) rotates with the wheel (3), wherein the sensor element (4) is additionally configured to output a sensor signal when the wheel (3) rotates, starting from a scanning of the signal paths (7) of the signal transmitters (6, 6a) and the calibration path of the calibration element (8) of the measuring ring element (2).Micromobility vehicle (1) with at least one wheel (3), characterized in that the micromobility vehicle (1) has a measuring system (5) according to claim 6, wherein the measuring ring element (2) is arranged on the wheel (3) so that the measuring ring element (2) rotates with the wheel (3), wherein the sensor element (4) is fixed to a stationary component (10) of the micromobility vehicle (1) so that the signal paths (7) of the signal transmitters (6, 6a) and the calibration path (9) of the calibration element (8) of the measuring ring element (2) can be scanned by means of the sensor element (4).

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