Hall wheel speed sensor and automobile electronic control system

Abstract

The utility model relates to the technical field of automobile parts, and provides a Hall wheel speed sensor and an automobile electronic control system. The Hall type wheel speed sensor comprises a separated Hall sensing head; a body circuit portion; and the connector is configured to electrically connect the Hall sensing head with the body circuit part and keep space separation between the Hall sensing head and the body circuit part. According to the utility model, through the separated Hall sensing head and the function multiplexing connector, the problem that the existing Hall wheel speed sensor cannot meet the use requirement under the high-temperature working condition is effectively solved, so that the Hall wheel speed sensor is suitable for the high-temperature working condition; and accurate and effective detection of the wheel speed can be realized under various working conditions.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to Hall effect wheel speed sensors and automotive electronic control systems. Background Technology

[0002] With the continuous development of automotive technology, active Hall effect wheel speed sensors have gradually replaced traditional passive magnetoelectric wheel speed sensors and are widely used in passenger cars and commercial vehicles.

[0003] Compared to magnetoelectric wheel speed sensors, Hall effect wheel speed sensors offer advantages such as stable output signals, high response frequencies, and strong resistance to electromagnetic interference, enabling efficient and accurate detection of wheel speed. However, a major disadvantage of Hall effect wheel speed sensors compared to magnetoelectric sensors is their poor high-temperature resistance. Wheel speed sensors need to be embedded in the wheel to generate magnetic induction, often facing high-temperature conditions, which existing Hall effect wheel speed sensors cannot meet.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this utility model, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a Hall effect wheel speed sensor and an automotive electronic control system to solve the problem that existing Hall effect wheel speed sensors cannot meet the requirements for use under high-temperature conditions.

[0006] According to one aspect of the present invention, a Hall effect wheel speed sensor is provided, comprising: a separate Hall effect sensor head; a body circuit portion; and a connector configured to electrically connect the Hall effect sensor head to the body circuit portion and to spatially separate the Hall effect sensor head from the body circuit portion.

[0007] In some embodiments, the Hall sensor head includes one or more Hall elements based on a group III-V compound.

[0008] In some embodiments, the III-V compound is gallium arsenide or indium antimonide.

[0009] In some embodiments, the connector includes or is configured as a conductive metal device.

[0010] In some embodiments, the conductive metal device is configured as a flat conductive metal plate and / or a conductive cable.

[0011] In some embodiments, the two ends of the connector are respectively welded to the Hall sensor head and the main body circuit portion to achieve electrical connection; wherein, the welding structure between the connector and the Hall sensor head and the main body circuit portion is a plurality of evenly distributed welding points or a continuous welding surface.

[0012] In some embodiments, the Hall effect wheel speed sensor further includes: a thermally insulating medium disposed in a first target region of the connector near the body circuit portion and / or a second target region of the body circuit portion near the connector.

[0013] In some embodiments, the thermally insulating medium is disposed within a housing of the first target region and / or the second target region, and is arranged in at least one of the following ways: filling the internal space of the housing; coating the inner wall of the housing; or covering electronic components within the housing.

[0014] In some embodiments, the thermal insulation medium is selected from any one of the following: glass fiber, asbestos, rock wool, silicate, aerogel felt, and vacuum plate.

[0015] In some embodiments, the body circuit portion is based on a silicon-based semiconductor; the Hall sensor head is packaged into a first independent package component, the body circuit portion is packaged into a second independent package component, and the Hall sensor head, the connector, and the body circuit portion are integrated and arranged on the same circuit board.

[0016] In some embodiments, the Hall effect wheel speed sensor further includes: an insulating bracket; a housing, wherein the circuit board is assembled in the housing via the insulating bracket, and the housing seals and encapsulates the insulating bracket and the circuit board; wherein the Hall effect sensor head is located at one end of the housing, and a wire harness electrically connected to the main circuit portion is led out from the other end of the housing.

[0017] According to another aspect of the present invention, an automotive electronic control system is provided, wherein the automotive electronic control system is equipped with a Hall-effect wheel speed sensor as described in any of the above embodiments.

[0018] The advantages of this invention compared to the prior art may include one or more of the following advantages:

[0019] This utility model's Hall effect wheel speed sensor employs a separate Hall effect sensor head. This separate sensor head is embedded in the wheel during actual assembly, placing it in a high-temperature environment. Thanks to the separate design of the Hall effect sensor head, the main circuitry of the Hall effect wheel speed sensor can be kept away from the high-temperature environment, preventing damage. The Hall effect sensor head can achieve high-temperature resistance through suitable structures / constructions such as high-temperature resistant materials and heat dissipation design to meet the requirements of use under high-temperature conditions.

[0020] The Hall sensor head and the main circuitry are electrically connected via a connector. The main circuitry analyzes and processes the electrical signals generated by the Hall sensor head to detect wheel speed. The Hall sensor head and the main circuitry are also spatially separated via another connector, ensuring a suitable and sufficient distance between them. This separate design keeps the main circuitry away from the high-temperature environment of the Hall sensor head during actual assembly, preventing damage from high-temperature conditions.

[0021] This invention effectively solves the problem that existing Hall-type wheel speed sensors cannot meet the requirements of high-temperature conditions by using a separate Hall sensor head and a multifunctional connector (the connector further separates the Hall sensor head from the main circuit part while realizing the electrical connection between the Hall sensor head and the main circuit part). This makes the Hall-type wheel speed sensor of this invention suitable for high-temperature conditions and can achieve accurate and effective detection of wheel speed under various conditions.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. It is obvious that the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0024] Figure 1 A schematic diagram of the circuit module of the Hall effect wheel speed sensor in an embodiment of this utility model is shown;

[0025] Figure 2 A schematic diagram of the external structure of the Hall effect wheel speed sensor in an embodiment of this utility model is shown. Detailed Implementation

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0027] The accompanying drawings are merely illustrative of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar structures, and therefore, repeated descriptions of them will be omitted.

[0028] In the description of this utility model, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The term "multiple" means two or more, unless otherwise explicitly specified. Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components.

[0029] It should be noted that, unless otherwise specified, the embodiments of this utility model and the features in different embodiments can be combined with each other.

[0030] Figure 1 The circuit module composition of the Hall effect wheel speed sensor in this embodiment of the present invention is illustrated. (Refer to...) Figure 1 As shown, the Hall effect wheel speed sensor provided by this utility model may include:

[0031] 100-type split Hall effect sensor head;

[0032] The main circuit section is 300;

[0033] Connector 200 is configured to electrically connect Hall sensor head 100 to body circuit section 300 and to maintain spatial separation between Hall sensor head 100 and body circuit section 300.

[0034] The Hall effect wheel speed sensor of this invention employs a separate Hall effect sensor head 100. This separate Hall effect sensor head 100 is embedded in the wheel during actual assembly, placing it in a high-temperature environment. Thanks to the separate design of the Hall effect sensor head 100, the main circuitry 300 can be kept away from the high-temperature environment, preventing damage. The Hall effect sensor head 100 can achieve high-temperature resistance through suitable structures / constructions such as high-temperature resistant materials and heat dissipation design to meet the requirements of use under high-temperature conditions.

[0035] In high-temperature conditions such as braking in heavy commercial vehicles, the embedded location of wheel speed sensors typically experiences ambient temperatures exceeding 150°C. Existing Hall effect wheel speed sensors cannot meet this temperature range and are prone to failure under high-temperature conditions. Specifically, existing Hall effect wheel speed sensors typically consist of a Hall element and other electronic components integrated into a single sensor chip, which is embedded in the wheel for installation. Hall elements are easily designed to withstand high temperatures, while electronic components are usually made of silicon-based semiconductor materials, with a typical temperature range of 125°C to 150°C. Beyond this temperature range, existing Hall effect wheel speed sensors become unreliable and are easily damaged. The Hall effect wheel speed sensor of this invention utilizes a separate Hall effect sensor head 100, which can reliably adapt to high-temperature conditions, such as environments exceeding 150°C, while the main circuitry 300 can be isolated from the high-temperature environment, allowing the entire Hall effect wheel speed sensor to meet the requirements for use under high-temperature conditions.

[0036] In this Hall effect wheel speed sensor, the Hall sensor head 100 and the main circuit section 300 are electrically connected, for example, for signal and power supply, via a connector 200. The specific circuit principles of the Hall sensor head 100 and the main circuit section 300 are known and therefore not specifically shown in the figures. The Hall sensor head 100 generates an electrical signal based on the change in the magnetic field caused by the rotation of the wheel, and the main circuit section 300 analyzes and processes the electrical signal generated by the Hall sensor head 100 to achieve wheel speed detection.

[0037] The main circuit section 300 may include a power supply section 300a and a signal processing section 300b, and the main circuit section 300 may be based on a silicon-based semiconductor substrate. In some embodiments, the present invention does not require changing the main circuit section 300 of the existing Hall-effect wheel speed sensor, but only needs to improve the separate Hall sensor head 100 and use a connector 200 to connect the Hall sensor head 100 and the main circuit section 300.

[0038] In this Hall effect wheel speed sensor, the Hall sensor head 100 and the main circuit section 300 are spatially separated by a connector 200. This ensures a sufficient and appropriate distance between the main circuit section 300 and the Hall sensor head 100, forming a separate design. This design serves two purposes: firstly, it keeps the main circuit section 300 away from the high-temperature environment of the Hall sensor head 100 during actual assembly, preventing damage to the main circuit section 300 (which is based on silicon semiconductors, and its maximum tolerable temperature range is less than that of the Hall sensor head 100); secondly, it avoids the connector 200 from being too long and increasing its internal resistance, ensuring a low-resistance connection between the Hall sensor head 100 and the main circuit section 300, thus facilitating efficient and accurate wheel speed detection. The specific length of the connector 200 can be determined based on the actual installation conditions.

[0039] This invention effectively solves the problem that existing Hall-type wheel speed sensors cannot meet the requirements of high-temperature operating conditions by using a separate Hall sensor head 100 and a multifunctional connector 200 (the connector 200 further spatially separates the Hall sensor head 100 from the main circuit part 300 while realizing the electrical connection between the Hall sensor head 100 and the main circuit part 300). This makes the Hall-type wheel speed sensor of this invention suitable for high-temperature operating conditions and can achieve accurate and effective detection of wheel speed under various operating conditions.

[0040] This utility model's Hall effect wheel speed sensor can be applied to numerous automotive electronic control systems, such as anti-lock braking systems (ABS), vehicle stability systems (ESP), traction control systems (TCS), and adaptive cruise control systems (ACC). It can achieve efficient and accurate wheel speed detection under various conditions, including high-temperature environments. Utilizing advantages such as stable output signal, high response frequency, and strong anti-electromagnetic interference capabilities, along with low-speed and static detection capabilities and bidirectional rotation detection (i.e., detecting whether the wheel is rotating forward or backward), it significantly improves vehicle dynamic control accuracy and active safety performance.

[0041] Taking an anti-lock braking system (ABS) as an example, this ABS can be configured with a Hall-effect wheel speed sensor as described in any of the above embodiments. In actual assembly, the Hall sensor head 100 of the Hall-effect wheel speed sensor is embedded in the wheel, while the main circuit part 300 is exposed outside the wheel. At least the connector 200 is used to achieve spatial separation and electrical connection between the Hall sensor head 100 and the main circuit part 300, effectively solving the problem that existing Hall-effect wheel speed sensors cannot meet the requirements of high-temperature conditions. This makes the Hall-effect wheel speed sensor suitable for high-temperature conditions, enabling accurate and effective detection of wheel speed under various conditions, thereby ensuring the accurate and reliable operation of the ABS.

[0042] In some embodiments, the Hall sensor head 100 includes one or more Hall elements based on a group III-V compound.

[0043] Group III-V compounds are compounds composed of Group III elements (such as gallium (Ga) and indium (In)) and Group V elements (such as arsenic (As) and antimony (Sb)). They possess high-temperature resistance (typically withstanding temperatures exceeding 200°C), enabling the Hall sensor head 100 to meet the requirements of high-temperature applications. Depending on the application scenario of the Hall-effect wheel speed sensor, specific Group III-V compounds can be gallium arsenide (GaAs) or indium antimonide (InSb), which offer excellent high-temperature resistance and high response sensitivity. Taking gallium arsenide as an example, its bandgap is wider than that of silicon. Since the bandgap typically narrows with increasing temperature, a wider bandgap provides superior high-temperature resistance, allowing the Hall sensor head 100 based on gallium arsenide to adapt to high-temperature conditions.

[0044] In other embodiments, other suitable group III-V compounds may be used as the substrate for the Hall sensor head 100, not limited to gallium arsenide and indium antimonide listed above. Furthermore, the number of Hall elements in the Hall sensor head 100 can be set as needed, for example, including two or three, to improve reliability through redundant design, but is not limited thereto.

[0045] In some embodiments, the connector 200 includes or is configured as a conductive metal device to achieve an electrical connection between the Hall sensor head 100 and the body circuit portion 300. The conductive metal device may be made of copper and / or silver. Silver and copper are low-resistance conductive materials, and using silver and copper to make the connector 200 can improve signal transmission efficiency and reduce power consumption. In some cases, to balance the high conductivity of silver and the low cost of copper, a silver-plated copper plate can be formed by electroplating a silver layer on the surface of a copper base to create a low-resistance connector 200.

[0046] Furthermore, in some embodiments, the conductive metal device is configured as a flat conductive metal plate and / or conductive cable. On the one hand, this increases the effective conductive cross-sectional area, thereby reducing the internal resistance of the connector 200. On the other hand, the flat structure has a large heat dissipation area and better bending resistance than wires, which helps to avoid the increase in the internal resistance of the connector 200 due to temperature rise and deformation. Here, "flat" means that the conductive metal device has the characteristic of being flat compared to traditional wires, but it still has a suitable thickness to ensure sufficient effective conductive cross-sectional area, heat dissipation area and bending resistance, so that the connector 200 has low internal resistance characteristics, reduces signal attenuation and distortion, and forms a low internal impedance loss electrical connection between the Hall sensor head 100 and the body circuit part 300, ensuring effective power supply transmission and signal transmission.

[0047] In some embodiments, the two ends of the connector 200 are respectively welded to the Hall sensor head 100 and the main circuit part 300 to achieve electrical connection; wherein, the welding structure between the connector 200 and the Hall sensor head 100 and the main circuit part 300 is a plurality of evenly distributed welding points or a continuous welding surface, and / or, the material of the welding structure is copper and / or silver.

[0048] Evenly distributed welding points can disperse the current path, optimize current distribution, avoid current concentration, and reduce localized heating and overall internal resistance. The specific number and spacing of welding points can be set as needed, as long as low internal resistance and structural stability are achieved. To avoid the potential for increased thermal stress introduced by multi-point welding, thermally conductive adhesives or other heat dissipation media can be coated onto the welded structure.

[0049] Surface welding, creating a continuous weld surface, effectively reduces contact resistance and further lowers overall internal resistance. Compared to multi-point welding, surface welding produces a more uniform current density and lower internal resistance. In practical applications, the specific weld structure can be selected according to needs, and the material can be chosen from suitable high-conductivity, low-resistance solders such as copper or silver to minimize resistance and thus improve overall circuit performance.

[0050] Figure 2 The diagram illustrates the external structure of the Hall effect wheel speed sensor in this embodiment of the invention, combined with... Figure 1 and Figure 2 As shown, in some embodiments, the Hall effect wheel speed sensor further includes: a thermally insulating medium 400 disposed in a first target region of the connector 200 near the body circuit portion 300 and / or a second target region of the body circuit portion 300 near the connector 200.

[0051] Based on the spatial separation of the Hall sensor head 100 and the main circuit part 300 by the connector 200, the Hall sensor head 100 and the main circuit part 300 are further physically separated by the thermal insulation medium 400, which effectively blocks the heat conduction path between the two, realizes reliable isolation between the two, and ensures that the main circuit part 300 is not affected by the high temperature environment where the Hall sensor head 100 is located under high temperature conditions.

[0052] The first / second target area where the thermal insulation medium 400 is located is close to but away from the high-temperature environment of the Hall sensor head 100 during actual assembly. The specific material of the thermal insulation medium 400 can be selected from any one of glass fiber, asbestos, rock wool, silicate, aerogel felt, and vacuum plate, or other materials that can effectively impede heat flow and achieve insulation protection. The thermal insulation medium 400 can be arranged in at least one of the following ways within the housing of the first and / or second target areas: filling the internal space of the housing, coating the inner wall of the housing, or covering the electronic components within the housing. For example, the thermal insulation medium 400 can cover the electronic components within the housing by wrapping, winding, or other methods, but is not limited to this.

[0053] In some embodiments, the Hall sensor head 100 is packaged as a first independent package component, and the main circuit portion 300 is packaged as a second independent package component. The Hall sensor head 100, connector 200, and main circuit portion 300 are integrated and arranged on the same circuit board. Specifically, the Hall sensor head 100, after packaging, is arranged in a first region of the circuit board, which will be embedded in the wheel during actual assembly and has a high ambient temperature. The main circuit portion 300, after packaging, is arranged in a second region of the circuit board, which has a low ambient temperature. The low-resistance connector 200 is arranged between the first and second regions, electrically connecting and spatially separating the Hall sensor head 100 from the main circuit portion 300. In this way, the Hall sensor head 100, connector 200, and main circuit portion 300 are integrated into a single package, achieving a reliable electrical connection.

[0054] In some embodiments, the Hall effect wheel speed sensor further includes: an insulating bracket (not specifically shown); a housing 500, in which a circuit board is mounted via the insulating bracket, and the housing 500 seals and encapsulates the insulating bracket and the circuit board; wherein, the Hall effect sensor head 100 is located at one end of the housing 500, and a wiring harness 300' electrically connected to the main circuit section 300 is led out from the other end of the housing 500. The insulating bracket provides mechanical support and insulation protection for components such as the Hall effect sensor head 100 and the main circuit section 300, while the housing 500 seals and encapsulates the components, protecting them from damage caused by moisture, heat, vibration, etc., and facilitating the assembly of the Hall effect wheel speed sensor in a vehicle.

[0055] This invention also provides an automotive electronic control system equipped with a Hall-effect wheel speed sensor as described in any of the above embodiments. This automotive electronic control system, such as an anti-lock braking system, vehicle stability system, traction control system, and adaptive cruise control system, can achieve efficient and accurate detection of wheel speed under various operating conditions, including high-temperature conditions, by configuring the aforementioned Hall-effect wheel speed sensor, significantly improving the accuracy of vehicle dynamic control and active safety performance.

[0056] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications or substitutions should be considered within the protection scope of the present invention.

Claims

1. A Hall wheel speed sensor, characterized by The Hall effect wheel speed sensor includes: Separate Hall effect sensor head; The main circuit part; and A connector configured to electrically connect the Hall sensor head to the body circuit portion and to spatially separate the Hall sensor head from the body circuit portion.

2. The Hall wheel speed sensor of claim 1, wherein, The Hall sensor head includes one or more Hall elements based on a group III-V compound.

3. The Hall wheel speed sensor of claim 2, wherein, The group III-V compound is gallium arsenide or indium antimonide.

4. The Hall wheel speed sensor of claim 1, wherein, The connector includes or is configured as a conductive metal device.

5. The Hall wheel speed sensor of claim 4, wherein, The conductive metal device is configured as a flat conductive metal plate and / or a conductive cable.

6. The Hall wheel speed sensor of claim 4, wherein, The two ends of the connector are respectively soldered to the Hall sensor head and the main circuit part to achieve electrical connection; The welding structure between the connector, the Hall sensor head, and the main circuit part consists of multiple evenly distributed welding points or a continuous welding surface.

7. The Hall wheel speed sensor of claim 1, wherein, The Hall effect wheel speed sensor also includes: A thermally insulating medium is disposed in a first target region of the connector near the body circuit portion and / or a second target region of the body circuit portion near the connector.

8. The Hall wheel speed sensor of claim 7, wherein, The thermal insulation medium is disposed within the housing of the first target region and / or the second target region, and is arranged in at least one of the following ways: Fill the internal space of the housing; Coated on the inner wall of the housing; The electronic components are enclosed within the housing.

9. The Hall wheel speed sensor of claim 7, wherein, The thermal insulation medium is selected from any one of the following: Fiberglass, asbestos, rock wool, silicates, aerogel felt, vacuum board.

10. The Hall wheel speed sensor of claim 1, wherein, The main circuit section is based on silicon-based semiconductors; The Hall sensor head is packaged into a first independent package component, the main body circuit portion is packaged into a second independent package component, and the Hall sensor head, the connector, and the main body circuit portion are integrated and arranged on the same circuit board.

11. The Hall wheel speed sensor of claim 10, wherein, The Hall effect wheel speed sensor also includes: Insulating support; The housing, wherein the circuit board is assembled in the housing via the insulating bracket, and the housing seals and encapsulates the insulating bracket and the circuit board; The Hall sensor head is located at one end of the housing, and a wire harness electrically connected to the main circuit section is led out from the other end of the housing.

12. An automotive electronic control system characterized by comprising: The automotive electronic control system is equipped with a Hall effect wheel speed sensor as described in any one of claims 1-11.

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