Gear shift detection device and vehicle

Abstract

The present disclosure provides a shift detection device, belonging to the technical field of vehicle shift. The shift detection device comprises: a ring magnet having a plurality of first polarity zones and a plurality of second polarity zones arranged alternately along the circumference; a Hall signal circuit comprising a plurality of signal transmission sub-circuits arranged in parallel, the plurality of signal transmission sub-circuits being arranged at different positions of the ring magnet and being respectively used for independently transmitting Hall signals, each signal transmission sub-circuit comprising two Hall sensors arranged in parallel, the Hall sensors being used for sensing the polarity of the ring magnet to trigger an output signal at the first polarity zone and generating relative motion with the ring magnet when the ring magnet rotates by one shift in a direction, so as to move from one first polarity zone to another first polarity zone through adjacent second polarity zones; and a controller electrically connected with the Hall signal circuit. The present disclosure can improve the stability of the signal, and improve the stability and reliability of the shift detection.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle shifting technology, and in particular to a shifting detection device and a vehicle. Background Technology

[0002] With the continuous advancement of automotive electronics technology, the requirements for the stability of shift detection in the vehicle's shift system are becoming increasingly stringent.

[0003] In related technologies, a single Hall sensor is used to sense the polarity of a magnet, and the Hall signal transmitted by the single Hall sensor is used to detect the gear shifting status of the vehicle.

[0004] However, when the Hall sensor malfunctions or external magnetic field conditions interfere with its sensing, using a single Hall sensor for shift detection results in poor signal stability, thus affecting the reliability and stability of shift detection. Utility Model Content

[0005] This disclosure provides a shift detection device and vehicle, which can increase redundancy, improve signal stability, and enhance the stability and reliability of shift detection. The technical solution includes at least the following: On one hand, a shift detection device is provided, comprising: a ring magnet having a plurality of first polarity regions and a plurality of second polarity regions arranged alternately along the circumference; a Hall signal circuit including a plurality of signal transmission sub-circuits arranged in parallel, the plurality of signal transmission sub-circuits being disposed at different positions of the ring magnet and used to independently transmit Hall signals, each signal transmission sub-circuit including two Hall sensors arranged in parallel, the Hall sensors being used to sense the polarity of the ring magnet to trigger an output signal in the first polarity region, and to generate relative motion with the ring magnet when the ring magnet rotates one gear in one direction, so as to move from one first polarity region through an adjacent second polarity region to another first polarity region; and a controller electrically connected to the Hall signal circuit for receiving the shift detection signal output by the Hall signal circuit.

[0006] Optionally, in the signal transmission sub-circuit, the two Hall sensors are arranged in a direction parallel to the circumference of the annular magnet.

[0007] Optionally, in the signal transmission sub-circuit, the two Hall sensors are located in the central region of the same first polarity region when the gear is not shifted.

[0008] Optionally, when the annular magnet rotates one gear in one direction to change gears, in the signal transmission sub-circuit, the two Hall sensors move from the center region of one first polarity region through an adjacent second polarity region to the center region of another first polarity region.

[0009] Optionally, the area of ​​the first polar region is larger than the area of ​​the second polar region.

[0010] Optionally, the shift detection device further includes a node control circuit, which is electrically connected to the Hall signal circuit and is used to control the power supply to the Hall signal circuit when the shift detection device is working.

[0011] Optionally, the Hall sensor is a unipolar Hall sensor.

[0012] Optionally, the controller is a vehicle body controller.

[0013] Optionally, the first polarity region is S polarity and the second polarity region is N polarity; or, the first polarity region is N polarity and the second polarity region is S polarity.

[0014] On the other hand, a vehicle is provided that includes any of the aforementioned shift detection devices.

[0015] The beneficial effects of the technical solutions provided in this disclosure include at least the following: In this embodiment, by configuring the Hall signal circuit as multiple parallel signal transmission sub-circuits, when external magnetic field interference occurs, since the multiple signal transmission sub-circuits are located at different positions on the ring magnet and are used to independently transmit Hall signals, the degree of interference to different signal transmission sub-circuits will also be different. In this way, multiple Hall signals can be provided to the controller, increasing redundancy and helping the controller to identify normal and abnormal signals, thereby significantly improving signal stability. In addition, each signal transmission sub-circuit includes two Hall sensors configured in parallel. The Hall sensors are used to sense the polarity of the ring magnet to trigger an output signal in the first polarity region, and generate relative motion with the ring magnet when the ring magnet rotates in one direction to change gears, so as to move from one first polarity region through an adjacent second polarity region to another first polarity region. This allows for better determination of the rotation direction of the ring magnet based on the signals from the two Hall sensors in the signal transmission sub-circuit, thus improving the detection of gear shifting status. Whenever the ring magnet rotates to shift gears, the Hall sensor's mode changes sequentially as "triggered-not triggered-triggered". Compared to the Hall sensor's mode changes sequentially as "not triggered-triggered-not triggered" during gear shifting, this provides a more stable waveform, thereby further improving the stability and reliability of gear shifting detection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the shift detection device provided in the embodiments of this disclosure; Figure 2 This is a structural block diagram of the shift detection device provided in the embodiments of this disclosure.

[0018] Figure label: 1: Ring magnet; 10: First polarity region; 11: Second polarity region; 2: Hall signal circuit; 20: Signal transmission sub-circuit; 201: Hall sensor; 3: Controller; 4: Node control circuit. Detailed Implementation

[0019] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” encompasses the element or object listed following “comprising” or “including” and its equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0020] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the shift detection device provided in the embodiments of this disclosure. Figure 2 This is a structural block diagram of the shift detection device provided in an embodiment of this disclosure. See also... Figure 1 and Figure 2The shift detection device includes: a ring magnet 1, which has multiple first polarity regions 10 and multiple second polarity regions 11 arranged alternately in the circumferential direction; a Hall signal circuit 2, which includes multiple signal transmission sub-circuits 20 arranged in parallel, which are located at different positions of the ring magnet 1 and are used to independently transmit Hall signals. Each signal transmission sub-circuit 20 includes two Hall sensors 201 arranged in parallel. The Hall sensors 201 are used to sense the polarity of the ring magnet 1 to trigger an output signal in the first polarity region 10, and to generate relative motion with the ring magnet 1 when the ring magnet 1 rotates one gear in one direction, so as to move from one first polarity region 10 through an adjacent second polarity region 11 to another first polarity region 10; and a controller 3, which is electrically connected to the Hall signal circuit 2 and is used to receive the shift detection signal output by the Hall signal circuit 2.

[0022] In this embodiment, by configuring the Hall signal circuit 2 as multiple parallel signal transmission sub-circuits 20, the external magnetic field conditions can be considered uniform during normal operation. When interference occurs from the external magnetic field, since the multiple signal transmission sub-circuits 20 are located at different positions of the ring magnet 1 and are used to independently transmit Hall signals, the degree of interference to different signal transmission sub-circuits 20 will also be different. In this way, multiple Hall signals can be provided to the controller 3, increasing redundancy and helping the controller 3 to identify normal and abnormal signals, thereby significantly improving signal stability. In addition, each signal transmission sub-circuit 20 includes two parallel Hall sensors 201. The Hall sensors 201 are used to sense the polarity of the ring magnet 1 to trigger an output signal in the first polarity region 10, and generate relative motion with the ring magnet 1 when the ring magnet 1 rotates one stop in one direction, so as to move from one first polarity region 10 through an adjacent second polarity region 11 to another first polarity region 10. This allows for better determination of the rotation direction of the ring magnet 1 based on the signals from the two Hall sensors 201 in the signal transmission sub-circuit 20, thus improving the detection of the shifting state. Whenever the ring magnet 1 is rotated to shift gears, the mode change of the Hall sensor 201 is sequentially "triggered-not triggered-triggered". Compared to the sequential "not triggered-triggered-not triggered" mode change of the Hall sensor 201 during gear shifting, this provides a more stable waveform, thereby further improving the stability and reliability of gear shift detection.

[0023] It should be noted that, in this embodiment, the Hall signal circuit 2 includes two signal transmission sub-circuits 20 connected in parallel. These two signal transmission sub-circuits 20 provide dual Hall signals to the controller 3, increasing redundancy while maintaining low cost. In other embodiments, the number of signal transmission sub-circuits 20 in the Hall signal circuit 2 can be adjusted according to actual needs. For example, more signal transmission sub-circuits 20 can be set to further increase redundancy, and this disclosure does not impose any limitations on this.

[0024] For example, the Hall sensor 201 is a unipolar Hall sensor. Because a unipolar Hall sensor is only sensitive to a single polarity magnetic field and generates a response trigger output signal when the magnetic field strength is greater than the action threshold, it does not generate a response when it moves away from that polarity magnetic field or resets in a magnetic field of another polarity, and the mode becomes untriggered. This allows the Hall sensor 201 to trigger a clear output signal in the first polarity region 10, resulting in a more stable waveform and thus achieving accurate detection of the shift state. For example, the Hall sensor 201 can be of model SC2432SO; in other embodiments, the Hall sensor 201 can also use other models as needed, and this disclosure does not limit this.

[0025] For example, the ring magnet 1 has 12 first polarity regions 10 and 12 second polarity regions 11 arranged alternately in the circumferential direction. In other embodiments, the number of first polarity regions 10 and second polarity regions 11 in the ring magnet 1 can be adjusted according to actual needs, and this disclosure does not limit this.

[0026] Optionally, such as Figure 1 As shown, the first polarity region 10 is S polarity, and the second polarity region 11 is N polarity. That is, the Hall sensor 201 can be triggered at the S pole, but not at the N pole or in the region without a magnetic field. Whenever the ring magnet 1 is rotated one gear to change gears, the relative motion trajectory of the Hall sensor 201 is "S pole-N pole-S pole", which can more stably obtain the changing waveform.

[0027] In other embodiments, the first polarity region 10 may be N polarity and the second polarity region 11 may be S polarity. The Hall sensor 201 is triggered at the N pole and not triggered at the S pole or in the region without a magnetic field. This disclosure does not limit this.

[0028] Optionally, in the signal transmission sub-circuit 20, two Hall sensors 201 are arranged parallel to the circumference of the ring magnet 1. This allows for more accurate detection of the gear shifting state when the ring magnet 1 rotates one gear, based on the signals from the two Hall sensors 201. For example, when the ring magnet 1 rotates one gear, Figure 1 Of the two Hall sensors 201 in the upper right corner, if the Hall sensor 201 on the left changes from the level of the triggered output signal to the level of the untriggered signal before the Hall sensor 201 on the right, then it is determined that the ring magnet 1 is rotating clockwise to shift gears; if the Hall sensor 201 on the right changes from the level of the triggered output signal to the level of the untriggered signal before the Hall sensor 201 on the left, then it is determined that the ring magnet 1 is rotating counterclockwise to shift gears.

[0029] For example, in the signal transmission sub-circuit 20, the two Hall sensors 201 are located in the central region of the same first polarity region 10 when the gear is not shifted. For instance, under normal conditions when the gear is not shifted, the two Hall sensors 201 can both be located in the same first polarity region 10, and the center point of the line connecting the two Hall sensors 201 coincides with the center point of the first polarity region 10. The magnetic field strength in the central region is the strongest. This ensures that the two Hall sensors 201 in the signal transmission sub-circuit 20 are both in the triggered state under normal conditions. They only become untriggered when they are far away from the first polarity region 10 or located in the second polarity region 11. This reduces the probability of external magnetic fields interfering with the signal of the Hall sensors 201, thereby effectively improving the stability and reliability of gear shift detection.

[0030] For example, when the ring magnet 1 rotates one gear in one direction to change gears, in the signal transmission sub-circuit 20, the two Hall sensors 201 move from the central region of one first polarity region 10 through the adjacent second polarity region 11 to the central region of another first polarity region 10.

[0031] Optionally, the area of ​​the first polarity region 10 is larger than the area of ​​the second polarity region 11. This can reduce the area of ​​the ring magnet 1 while ensuring high stability and reliability of gear shift detection, thereby reducing costs.

[0032] Optionally, such as Figure 2 As shown, the shift detection device also includes a node control circuit 4, which is electrically connected to the Hall signal circuit 2 and is used to control the power supply to the Hall signal circuit 2 when the shift detection device is working. Powering the Hall signal circuit 2 only during operation can significantly reduce power consumption.

[0033] For example, the input terminal of the node control circuit 4 is electrically connected to a +5V voltage, and the output terminal is electrically connected to the Hall signal circuit 2, providing 5V power to the Hall signal circuit 2 when the shift detection device is working.

[0034] For example, controller 3 is a Body Control Module (BCM). The BCM interacts with Hall effect signal circuit 2 via electrical connection. Hall effect signal circuit 2 transmits a stable shift detection signal to the BCM. The BCM can then use software to analyze the Hall effect signal to identify normal and abnormal signals, thus more reliably detecting the vehicle's shifting status. For instance, controller 3 could be a model BAT32A237KH40NB, and it can be electrically connected to Hall effect signal circuit 2 via a typical RC circuit (resistor-capacitor circuit). In other embodiments, controller 3 can also use other models as needed, and this disclosure does not limit this.

[0035] This disclosure also provides a vehicle that includes any of the aforementioned shift detection devices.

[0036] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A gear shift detection device, characterized in that, include: A ring magnet having a plurality of first polarity regions and a plurality of second polarity regions arranged alternately in a circumferential direction; The Hall signal circuit includes multiple signal transmission sub-circuits arranged in parallel. The multiple signal transmission sub-circuits are arranged at different positions of the annular magnet and are used to independently transmit Hall signals. Each signal transmission sub-circuit includes two Hall sensors arranged in parallel. The Hall sensors are used to sense the polarity of the annular magnet to trigger an output signal in the first polarity region, and to generate relative motion with the annular magnet when the annular magnet rotates one stop in one direction, so as to move from one first polarity region through an adjacent second polarity region to another first polarity region. The controller is electrically connected to the Hall signal circuit and is used to receive the shift detection signal output by the Hall signal circuit.

2. The shift detection device according to claim 1, characterized in that, In the signal transmission sub-circuit, the two Hall sensors are arranged in a direction parallel to the circumference of the ring magnet.

3. The shift detection device according to claim 2, characterized in that, In the signal transmission sub-circuit, the two Hall sensors are located in the central region of the same first polarity region when the gear is not shifted.

4. The shift detection device according to claim 3, characterized in that, When the annular magnet rotates one gear in one direction to change gears, in the signal transmission sub-circuit, the two Hall sensors move from the center region of one first polarity region through an adjacent second polarity region to the center region of another first polarity region.

5. The shift detection device according to claim 3, characterized in that, The area of ​​the first polar region is larger than the area of ​​the second polar region.

6. The shift detection device according to any one of claims 1 to 5, characterized in that, The shift detection device further includes a node control circuit, which is electrically connected to the Hall signal circuit and is used to control the power supply to the Hall signal circuit when the shift detection device is working.

7. The shift detection device according to any one of claims 1 to 5, characterized in that, The Hall sensor is a unipolar Hall sensor.

8. The shift detection device according to any one of claims 1 to 5, characterized in that, The controller is a vehicle body controller.

9. The shift detection device according to any one of claims 1 to 5, characterized in that, The first polarity region is S polarity, and the second polarity region is N polarity; or, The first polarity region is N polarity, and the second polarity region is S polarity.

10. A vehicle, characterized in that, Includes the shift detection device as described in any one of claims 1 to 9.

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