A sensor assembly and a vehicle

Abstract

This utility model discloses a sensor assembly and a vehicle, comprising: a sensor spaced apart from one side of a workpiece to be detected; a demagnetizing coil fixed to the other side of the workpiece; a first wiring harness, one end of which is connected to the sensor, and the other end of which is connected to a first electrical connector, the first wiring harness supplying power to the sensor to replace a permanent magnet; and a second wiring harness spaced apart from the demagnetizing coil, the second wiring harness providing induced current. One end of the second wiring harness is connected to the first electrical connector, and the other end of which is connected to a second electrical connector for signal transmission. The other end of the first wiring harness and one end of the second wiring harness are covered together by a wiring harness protective layer. The demagnetizing coil includes an iron core and windings, the iron core being a ring structure, and the windings being wound at intervals around the circumferential surface of the iron core. This utility model can effectively demagnetize the workpiece to be detected, improving the detection accuracy of the sensor.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, and in particular to a sensor assembly and a vehicle. Background Technology

[0002] Iron components are core parts of automotive transmission and suspension systems. Their main functions include supporting rotating parts and bearing radial or axial loads, ensuring effective power transmission and driving stability. Sensors are typically used to detect the motion state of iron components.

[0003] However, when iron parts become magnetic due to work hardening, friction magnetization, or the action of an external magnetic field, the residual magnetic field they generate can interfere with the sensor's signal acquisition, leading to system misjudgment and causing problems such as control deviation. Utility Model Content

[0004] The purpose of this invention is to solve the problem of inaccurate sensor detection caused by the magnetism of the part to be tested. This invention provides a sensor assembly and a vehicle that can effectively demagnetize the part to be tested, thereby improving the accuracy of sensor detection.

[0005] To address the aforementioned technical problems, this utility model discloses a sensor assembly, comprising a sensor spaced apart from one side of a workpiece to be tested; a demagnetizing coil fixed to the other side of the workpiece; a first wiring harness, one end of which is connected to the sensor and the other end of which is connected to a first electrical connector, the first wiring harness supplying power to the sensor to replace a permanent magnet; and a second wiring harness spaced apart from the demagnetizing coil, the second wiring harness providing an induced current.

[0006] By adopting the above technical solution, the sensor is powered by the first wire harness, thereby replacing the permanent magnet. This can effectively reduce the influence of the permanent magnet on the magnetic field of the object to be tested and effectively improve the stability of the sensor output signal. The second wire harness is set at an interval from the demagnetizing coil. When current flows through the demagnetizing coil, it can generate an alternating magnetic field, thereby effectively demagnetizing the object to be tested.

[0007] According to another specific embodiment of the present invention, one end of the second wire harness is connected to the first electrical connector, and the other end of the second wire harness is connected to the second electrical connector for transmitting signals.

[0008] With the above technical solution, the other end of the first wire harness and one end of the second wire harness are respectively connected by a first electrical connector, which can supply power to the sensor and the demagnetizing coil simultaneously through the first and second wire harnesses, effectively reducing the number of parts.

[0009] According to another specific embodiment of the present invention, the other end of the first wire harness and one end of the second wire harness are covered together by a wire harness protective layer.

[0010] By adopting the above technical solution, the first and second wire harnesses are covered by a wire harness protective layer, which can prevent the wire harnesses from being damaged by friction, vibration or external impact, and effectively improve the service life of the wire harnesses.

[0011] According to another specific embodiment of the present invention, the demagnetizing coil includes an iron core and windings, the iron core having a ring structure, and the windings being wound at intervals on the circumferential surface of the iron core.

[0012] According to another specific embodiment of the present invention, a first housing is provided, the first housing having a mounting cavity, and the iron core and winding are disposed in the mounting cavity; a second housing is a tubular structure, the second wire harness passes through the second housing, and one end of the second housing is fixedly connected to the second electrical connector; the second housing is used to fixally connect to the device to be tested; the first housing and the second housing are fixedly connected.

[0013] By adopting the above technical solution, the demagnetizing coil is placed in the mounting compartment of the first housing, which can effectively reduce magnetic field leakage, protect the iron core and winding from damage caused by friction or collision of foreign objects, and effectively extend the service life. In addition, the second housing is a curved tubular structure, and one end of the second housing is fixed to the second electrical connector, which can effectively constrain the position of the second housing and prevent the second housing from shifting due to vibration and other factors, thus effectively improving the stability of the power supply of the demagnetizing coil.

[0014] According to another specific embodiment of the present invention, the interior of the second housing is provided with an annular groove, and the second electrical connector is provided with an annular boss. The annular groove and the annular boss are in a concave-convex fit to prevent the second housing from detaching from the second electrical connector.

[0015] By adopting the above technical solution, the annular groove inside the second housing and the annular boss of the second electrical connector are used to fix the second housing, which can effectively constrain the position of the second housing, prevent the second housing from shifting due to vibration and other factors, and effectively improve the stability of the power supply of the demagnetizing coil.

[0016] According to another specific embodiment of the present invention, the second housing includes a first part and a second part, which are fixed by a snap fastener.

[0017] The above technical solution provides a snap-fit ​​mechanism to fix the first and second parts, allowing for non-destructive disassembly of the second housing and facilitating the replacement of the wiring harness.

[0018] According to another specific embodiment of the present invention, the interior of the second housing is provided with a slot, which is used to fix and connect with the part to be tested.

[0019] By adopting the above technical solution, a slot is set inside the second housing to fix the slot onto the workpiece to be tested. This ensures accurate positioning of the demagnetizing coil and the workpiece to be tested, avoids uneven demagnetization due to poor positioning, and this design can effectively save space.

[0020] According to another specific embodiment of this utility model, the sensor is a wheel speed sensor.

[0021] The present invention also discloses a vehicle, which includes at least the sensor assembly described in any of the above embodiments, including a component to be detected and having a protrusion, the protrusion being fixed to the demagnetizing coil.

[0022] By adopting the above technical solution, the protrusion on the test piece can be fixed by cooperating with the slot of the demagnetizing coil, so that the fixation is more secure and the demagnetizing coil is prevented from falling off due to vibration. Attached Figure Description

[0023] Figure 1 A schematic diagram of the wheel speed sensor assembly provided in an embodiment of this application is shown.

[0024] Figure 2 A perspective view of the wheel speed sensor assembly provided in an embodiment of this application is shown.

[0025] Figure 3 A perspective view of the demagnetizing coil in the wheel speed sensor assembly provided in an embodiment of this application is shown.

[0026] Figure 4 A partial cross-sectional view of the wheel speed sensor assembly provided in an embodiment of this application is shown.

[0027] Figure 5 A partially enlarged view of the wheel speed sensor assembly provided in an embodiment of this application is shown. Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0029] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0031] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0034] Iron components are core parts of automotive transmission and suspension systems. Their main functions include supporting rotating parts and bearing radial or axial loads, ensuring effective power transmission and driving stability. Sensors are typically used to detect the motion state of iron components.

[0035] In some embodiments, when an iron part becomes magnetic due to work hardening, tribomagnetization, or the action of an external magnetic field, the residual magnetic field it generates can interfere with the sensor's signal acquisition, leading to system misjudgment and causing problems such as control deviation.

[0036] Therefore, this application provides a sensor assembly for use in a vehicle, wherein the component to be tested has a protrusion, and a demagnetizing coil is fixed to the component to be tested through the protrusion to demagnetize the residual magnetism of the component to be tested, thereby avoiding interference of the magnetic field generated by the residual magnetism with the sensor's signal acquisition.

[0037] It is understood that the aforementioned component to be tested can be an iron bearing or other iron components, such as a brake disc, and this application does not impose any restrictions on this. The aforementioned sensor can be a wheel speed sensor or other sensors, such as an anti-lock braking system sensor, and this application does not impose any restrictions on this.

[0038] Specifically, refer to Figure 1 and Figure 2 The sensor assembly 100 of this application embodiment includes a sensor 200, a demagnetizing coil 300, a first wiring harness 400a, and a second wiring harness 400b. The sensor 200 is spaced apart from one side of the object to be detected (A), and the demagnetizing coil 300 is fixed to the other side of the object to be detected (A). One end of the first wiring harness 400a is connected to the sensor 200 and supplies power to the sensor 200, replacing the permanent magnet. The other end of the first wiring harness 400a is connected to a first electrical connector 500a. The demagnetizing coil 300 and the second wiring harness 400b are spaced apart, and the second wiring harness 400b provides an induced current. One end of the second wiring harness 400b is connected to the first electrical connector 500a, and the other end is connected to a second electrical connector 500b for signal transmission. The other end of the first wiring harness 400a and one end of the second wiring harness 400b are covered together by a wiring harness protective layer 600.

[0039] For example, refer to Figure 1 In this embodiment, the component to be tested, A, is an iron bearing, and the sensor 200 is a wheel speed sensor. A demagnetizing coil 300 is fixed to one side of the iron bearing for demagnetization. The wheel speed sensor is spaced apart from the other side of the iron bearing to detect the rotational speed of the iron bearing. The distance between the wheel speed sensor and the iron bearing ranges from 0.3mm to 2mm, for example, 0.3mm, 1mm, 1.5mm, or 2mm.

[0040] Specifically, refer to Figure 2 and Figure 3 The current flows through the first wiring harness 400a to power the sensor 200, thereby replacing the permanent magnet. This effectively reduces the influence of the permanent magnet on the magnetic field of the object to be detected, A, and improves the stability of the output signal of the sensor 200. The second wiring harness 400b powers the demagnetizing coil 300. When the current flows through the demagnetizing coil 300, it generates an alternating magnetic field, effectively demagnetizing the object to be detected, A. The other end of the first wiring harness 400a and one end of the second wiring harness 400b are respectively connected to the first electrical connector 500a. The sensor 200 and the demagnetizing coil 300 can be powered simultaneously by a single power source through the first wiring harness 400a and the second wiring harness 400b, effectively reducing the number of components. Furthermore, the other end of the first wiring harness 400a and one end of the second wiring harness 400b are covered together by the wiring harness protective layer 600, which prevents the wiring harness from being damaged by friction, vibration, or external impact, effectively improving the service life of the wiring harness.

[0041] It should be noted that the other end of the second wiring harness 400b is connected to the second electrical connector 500b. On the one hand, this allows the current flowing through the second wiring harness 400b to form a closed loop, ensuring stable current flow and enabling the demagnetizing coil 300 to generate a uniform and controllable magnetic field. On the other hand, the second electrical connector 500b is connected to the controller to transmit the signal output by the controller. The controller can monitor the current parameters flowing through the second wiring harness 400b in real time and adjust or cut off the demagnetizing function when necessary.

[0042] For example, the wire harness protective layer 600 is made of ethylene propylene rubber. However, those skilled in the art will understand that in other embodiments, the wire harness protective layer 600 may be made of other materials, such as polyvinyl chloride, thermoplastic elastomers, etc., and this application does not limit this.

[0043] Further reference Figure 3 The demagnetizing coil 300 includes an iron core 310 and a winding 320. The iron core 310 has a ring structure, and the winding 320 is wound at intervals on the circumferential surface of the iron core 310.

[0044] In some possible embodiments, the demagnetizing coil 300 is an air-core coil, an electromagnet ring, or a linear array structure.

[0045] refer to Figure 4 and Figure 5 It also includes a first housing 700, which has a mounting cavity 710 in which the demagnetizing coil 300 is disposed; a second housing 800, which is a tubular structure, through which the second wire harness 400b passes, and one end of the second housing 800 is fixedly connected to the second electrical connector 500b; the first housing 700 and the second housing 800 are fixedly connected.

[0046] Specifically, the first housing 700 is disposed on the second housing 800, the demagnetizing coil 300 is disposed in the mounting cavity 710 of the first housing 700, and the second wire harness 400b passes through the second housing 800. That is, the demagnetizing coil 300 and the second wire harness 400b are disposed at intervals. When the current in the second wire harness 400b flows through the demagnetizing coil 300, according to Ampere's circuital law, an alternating magnetic field is generated inside the winding 320. The high permeability of the iron core 310 can concentrate and amplify the magnetic field, so that the test piece A is in a strong alternating magnetic field. The alternating magnetic field causes the microscopic magnetic units in the test piece A to repeatedly flip with the direction of the magnetic field, gradually disrupting their orderly arrangement, thereby achieving the demagnetizing effect.

[0047] For example, the first housing 700 is cylindrical. However, those skilled in the art will understand that in other embodiments, the first housing 700 may be other shapes, such as cuboids, cubes, etc., and this application does not limit this.

[0048] For example, the second housing 800 is an L-shaped curved tubular structure. However, those skilled in the art will understand that in other embodiments, the second housing 800 can be other shapes, such as a straight structure, depending on the location of the second electrical connector 500b, and this application does not impose any limitations on this.

[0049] For example, the current flowing through the second wiring harness 400b is alternating current (AC). However, those skilled in the art will understand that in other embodiments, the current flowing through the second wiring harness 400b may also be direct current (DC), and this application does not limit this.

[0050] For example, the first housing 700 is made of polyphenylene sulfide. However, those skilled in the art will understand that in other embodiments, the first housing 700 may be made of other plastics or metals, such as nylon, aluminum alloy, etc., and this application does not limit this.

[0051] For example, the second housing 800 is made of ethylene propylene rubber. However, those skilled in the art will understand that in other embodiments, the second housing 800 may be made of other materials, such as polyvinyl chloride, thermoplastic elastomers, etc., and this application does not limit this.

[0052] Further reference Figure 4 The second housing 800 has an annular groove 810 inside, and the second electrical connector 500b has an annular boss 510. The annular groove 810 and the annular boss 510 are in a concave-convex fit to prevent the second housing 800 from disengaging from the second electrical connector 500b.

[0053] Specifically, the second housing 800 has an annular groove 810 inside, and the end of the second electrical connector 500b has an annular boss 510. The second housing 800 and the second electrical connector 500b are fixed by the engagement of the annular boss 510 and the annular groove 810. This can effectively constrain the position of the second housing 800 and prevent the second housing 800 from shifting due to vibration and other factors, thereby effectively improving the stability of the power supply of the demagnetizing coil 300.

[0054] However, those skilled in the art will understand that in other embodiments, the second housing 800 and the second electrical connector 500b can be fixed in other ways, such as snap-fit, spring clip, etc., and this application does not limit this.

[0055] For example, the annular boss 510 has a conical structure. However, those skilled in the art will understand that the annular boss 510 can also have other structures, such as a cylindrical boss, and this application does not limit it in this regard.

[0056] Further reference Figure 4 The second housing 800 is fixedly connected to the part A to be tested. The interior of the second housing 800 is provided with a slot 850, which is fixedly connected to the part A to be tested.

[0057] Specifically, the second housing 800 is provided with a first guide rib 821 and a second guide rib 831, which are spaced apart. The first guide rib 821 is provided in the first part 820 and the second guide rib 831 is provided in the second part 830. The slot 850 is formed by the first guide rib 821 and the second guide rib 831. The workpiece A to be tested is provided with a protrusion (not shown in the figure), which is fixed by the slot 850 through a concave-convex fit, thereby fixing the second housing 800 and the workpiece A to be tested, that is, fixing the demagnetizing coil 300 and the workpiece A to be tested.

[0058] For example, when the component A to be tested is an iron bearing, a caliper is provided on the iron bearing, and the groove 850 of the second housing 800 is fixedly connected to the protrusion of the caliper. However, those skilled in the art will understand that the second housing 800 can be fixed to the caliper in other ways, such as screws or bolts, and this application does not limit this.

[0059] It should be noted that the first guide rib 821 and the second guide rib 831 work together to provide guidance, and the second wire harness 400b passes between the first guide rib 821 and the second guide rib 831 to connect with the second electrical connector 500b.

[0060] Further reference Figure 5 The second housing 800 includes a first part 820 and a second part 830, which are fixed by a snap fastener 840.

[0061] Specifically, a clip 840 is provided to secure the first part 820 and the second part 830, allowing for non-destructive disassembly of the second housing 800 and facilitating the replacement of the wiring harness. However, those skilled in the art will understand that in other embodiments, the first part 820 and the second part 830 can be secured in other ways, such as cable ties, fixing clips, etc., and this application does not impose any limitations on this.

[0062] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A sensor assembly, characterized by include: A sensor, wherein the sensor is positioned at a distance from one side of the object to be detected; A demagnetizing coil, the demagnetizing coil being used to fix to the other side of the workpiece to be tested; A first wiring harness, one end of which is connected to the sensor and the other end of which is connected to a first electrical connector, is used to power the sensor in place of a permanent magnet. The second wiring harness, which is spaced apart from the demagnetizing coil, is used to provide induced current.

2. The sensor assembly as claimed in claim 1, characterized in that, One end of the second wire harness is connected to the first electrical connector, and the other end of the second wire harness is connected to the second electrical connector for transmitting signals.

3. The sensor assembly of claim 2, wherein, The other end of the first wire harness and one end of the second wire harness are covered together by a wire harness protective layer.

4. The sensor assembly of claim 3, wherein, The demagnetizing coil includes an iron core and windings. The iron core has a ring structure, and the windings are wound at intervals around the circumferential surface of the iron core.

5. The sensor assembly of claim 4, wherein, It also includes, A first housing, wherein the first housing is provided with a mounting cavity, and the iron core and the winding are disposed within the mounting cavity; The second housing is a tubular structure, the second wire harness passes through the second housing, one end of the second housing is fixedly connected to the second electrical connector, and the second housing is used to fixally connect to the device under test. The first housing and the second housing are fixedly connected.

6. The sensor assembly of claim 5, wherein, The second housing has an annular groove inside, and the second electrical connector has an annular boss. The annular groove and the annular boss are in a concave-convex fit to prevent the second housing from detaching from the second electrical connector.

7. The sensor assembly as claimed in claim 5, characterized in that, The second housing includes a first part and a second part, which are secured by snap fasteners.

8. The sensor assembly of claim 7, wherein, The second housing has a slot inside, which is used to fix the part to be tested.

9. The sensor assembly of any one of claims 1 to 8, wherein, The sensor is a wheel speed sensor.

10. A vehicle characterized by comprising: include, The sensor assembly as described in any one of claims 1 to 9; The part to be tested has a protrusion, which is fixed to the demagnetizing coil.

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