Automobile combination switch calibration system based on 3D hall sensor
Patent Information
- Application Number
- CN202522136446.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-10
AI Technical Summary
在实现本申请过程中，申请人发现目前汽车方向盘组合开关通过绝对定位的方式标定数据，由于组合开关标定前装夹存在间隙，从而导致标定的初始角度与设计存在误差，导致组合开关标定后的信号切换角度与产品图纸设计存在较大误差，同时在组合开关长期使用过程中，由于存在金属疲劳，表面镀层磨损等原因，长时间工作易导致开关档位失效等问题
本申请基于3D霍尔传感器的汽车组合开关标定系统通过驱动组件驱动丝杆导轨而带动上拨动杆和下拨动杆沿着丝杆导轨滑动，使上拨动杆或者下拨动杆接触并推动汽车组合开关的手柄，同时上力传感器或者下力传感器采集上拨动杆或者下拨动杆推动汽车组合开关的手柄的推动力。本申请通过读取3D霍尔传感器的角度实时值与霍尔强度值的方式来判定档位信号工作范围，该方式无需金属弹片，能够长时间稳定工作。同时本申请的基于3D霍尔传感器的汽车组合开关标定系统采用3段位移速度，保证系统能够快速准确定位到标定位置，即首先，由于上拨动杆、下拨动杆与手柄之间距离较远，需要拨动杆快速移动到组合开关的手柄初始位置；其次，力传感器数据采集有一定延时，需要拨动杆低速运行寻找手柄零位接触位置；最后，产品找到拨动杆零位后需要快速定位到组合开关标定角度。
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Figure CN224802369U_ABST
Abstract
Description
Technical Field
[0001] This application relates to an automotive steering wheel combination switch, and more particularly to an automotive combination switch calibration system based on a 3D Hall sensor. Background Technology
[0002] Currently, most automotive steering wheel combination switches achieve gear switching through contact between metal springs and PCB contacts. In developing this application, the applicant discovered that current automotive steering wheel combination switches are calibrated using absolute positioning. Due to gaps in the clamping before calibration, the initial calibration angle deviates from the design, resulting in significant discrepancies between the calibrated signal switching angle and the product drawing design. Furthermore, during long-term use, metal fatigue and surface plating wear can easily lead to switch gear failure. Utility Model Content
[0003] To address the aforementioned technical problems, this application provides a calibration system for automotive combination switches based on a 3D Hall sensor. The specific technical solution is as follows: In a first aspect, a calibration system for an automotive combination switch based on a 3D Hall sensor is provided, comprising a lead screw guide, a drive assembly, an actuator assembly, and sensors. The lead screw guide is disposed on both sides of the automotive combination switch. The drive assembly is connected to the lead screw guide. The actuator assembly is disposed on the lead screw guide. The actuator assembly includes an upper toggle lever and a lower toggle lever. The upper and lower toggle levers are located on both sides of the automotive combination switch and correspond to the handle of the automotive combination switch. The drive assembly drives the lead screw guide, causing the upper and lower toggle levers to slide along the lead screw guide, so that the upper or lower toggle lever contacts and pushes the handle of the automotive combination switch. Sensors are disposed on the actuator assembly. The sensors include an upper force sensor and a lower force sensor. The upper force sensor is disposed on the upper toggle lever. The lower force sensor is disposed on the lower toggle lever. The upper and lower force sensors are used to collect the pushing force of the upper or lower toggle lever pushing the handle of the automotive combination switch.
[0004] In one embodiment, the drive assembly further includes a drive member that is connected to the lead screw of the lead screw guide rail.
[0005] In one embodiment, the drive assembly includes a coupling, the drive element is connected to the input shaft of the coupling, and the output shaft of the coupling is connected to the lead screw of the lead screw guide.
[0006] In one embodiment, the drive element uses a servo motor.
[0007] In one embodiment, the upper and lower levers are mounted on the lead screw guide via metal blocks.
[0008] In one embodiment, the upper and lower levers use cylindrical plastic rollers.
[0009] In one embodiment, when the upper and lower levers are in their initial positions, the handle of the automotive combination switch is in the middle position between the upper and lower levers.
[0010] In one embodiment, the upper force sensor and the lower force sensor have a preset value. After the upper or lower lever contacts the handle of the car combination switch, the upper or lower force sensor collects the pushing force. When the pushing force is greater than the preset value, the position information of the upper or lower lever is recorded as the zero starting point of the corresponding lever, and the lever moves to the corresponding position according to the target gear calculated by the simulation software. After the upper or lower lever reaches the target gear, calibration data is written through the CANFD bus protocol.
[0011] Compared with the prior art, this application has the following beneficial technical effects: This application presents a 3D Hall sensor-based automotive combination switch calibration system. A drive assembly drives a lead screw guide, causing the upper and lower levers to slide along the guide. This allows either the upper or lower lever to contact and push the handle of the automotive combination switch. Simultaneously, an upper or lower force sensor collects the pushing force exerted by the lever on the handle. This application determines the gear signal's operating range by reading the real-time angle and Hall intensity values from the 3D Hall sensor. This method eliminates the need for metal springs and allows for stable operation over extended periods. Furthermore, this 3D Hall sensor-based automotive combination switch calibration system employs a three-stage displacement speed to ensure rapid and accurate positioning to the calibration position. First, due to the significant distance between the upper and lower levers and the handle, the levers need to quickly move to the initial position of the combination switch handle. Second, the force sensor data acquisition has a certain delay, requiring the levers to move at a low speed to find the zero-position contact point of the handle. Finally, after finding the zero position of the lever, the system needs to quickly locate the calibration angle of the combination switch. Attached Figure Description
[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the automotive combination switch calibration system based on a 3D Hall sensor according to this application. Detailed Implementation
[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0014] For current automotive steering wheel combination switch calibration, the calibration position angle must meet the requirement of ±0.5°. Excessive calibration error will lead to poor gear shift feel or even functional failure. However, the current calibration method uses absolute positioning to directly move to the calibration position. Due to the mechanical backlash in the clamping before calibration, there is a large deviation between the calibration target position and the product design angle each time the product is clamped, resulting in 40% of combination switch products exceeding the calibration range. This application determines the initial position of the handle calibration zero position by using force value and uses a relative calibration method to find the calibration position, thereby avoiding deviation caused by the combination switch not being in a horizontal state at the initial position, and ensuring that the combination switch product meets the calibration position requirements 100%.
[0015] Please see Figure 1 This is a schematic diagram of the automotive combination switch calibration system based on a 3D Hall sensor according to this application. As shown in the figure, the automotive combination switch calibration system 1 based on a 3D Hall sensor in this embodiment is mainly applied to the calibration of the automotive steering wheel combination switch S. The automotive combination switch calibration system 1 based on a 3D Hall sensor includes a lead screw guide 2, a drive assembly 3, an execution assembly 4, and a sensor 5. The lead screw guide 2 is disposed on both sides of the automotive combination switch S. The drive assembly 3 is connected to the lead screw guide 2. In this embodiment, the drive assembly 3 also includes a drive member 31. The drive member 31 is connected to the lead screw of the lead screw guide 2. The drive assembly 3 also includes a coupling 32. The drive member 31 is connected to the input shaft of the coupling 32. The output shaft of the coupling 32 is connected to the lead screw of the lead screw guide 2. The drive member 31 drives the lead screw of the lead screw guide 2 to rotate through the coupling 32. The drive member 31 uses a servo motor.
[0016] The actuating component 4 is mounted on the lead screw guide rail 2. The actuating component 4 includes an upper actuating lever 41 and a lower actuating lever 42. The upper actuating lever 41 and the lower actuating lever 42 are mounted on the lead screw guide rail 2 via metal blocks. The upper actuating lever 41 and the lower actuating lever 42 are located on both sides of the automotive combination switch S and correspond to the handle S1 of the automotive combination switch S. When the upper actuating lever 41 and the lower actuating lever 42 are in their initial positions, i.e., before system calibration, the handle S1 of the automotive combination switch S is located in the middle position between the upper actuating lever 41 and the lower actuating lever 42. The driving component 3 drives the lead screw guide rail 2, causing the upper actuating lever 41 and the lower actuating lever 42 to slide along the lead screw guide rail 2, so that either the upper actuating lever 41 or the lower actuating lever 42 contacts and pushes the handle S1 of the automotive combination switch S.
[0017] Sensor 5 is installed on actuator 4. Sensor 5 includes an upper force sensor 51 and a lower force sensor 52. The upper force sensor 51 is installed on the upper toggle lever 41. The lower force sensor 52 is installed on the lower toggle lever 42. The upper force sensor 51 and the lower force sensor 52 are used to collect the pushing force of the upper toggle lever 41 or the lower toggle lever 42 pushing the handle S1 of the vehicle combination switch S. The upper force sensor 51 and the lower force sensor 52 have a preset value. After the upper toggle lever 41 or the lower toggle lever 42 contacts the handle S1 of the vehicle combination switch S, the upper force sensor 51 or the lower force sensor 52 collects the pushing force. When the pushing force is greater than the preset value, the position information of the upper toggle lever 41 or the lower toggle lever 42 is recorded as the zero starting point of the corresponding toggle lever, and the lever moves to the corresponding position according to the target gear calculated by the simulation software. After the upper toggle lever 41 or the lower toggle lever 42 reaches the target gear, calibration data is written through the CANFD bus protocol.
[0018] The automotive combination switch calibration system 1 based on a 3D Hall sensor in this embodiment uses a drive assembly 3 to drive a lead screw guide 2, causing the upper actuating lever 41 and the lower actuating lever 42 to slide along the lead screw guide 2. This allows either the upper actuating lever 41 or the lower actuating lever 42 to contact and push the handle S1 of the automotive combination switch S. Simultaneously, an upper force sensor 51 or a lower force sensor 52 collects the pushing force exerted by the upper actuating lever 41 or the lower actuating lever 42 on the handle S1 of the automotive combination switch S. This embodiment determines the working range of the gear signal by reading the real-time angle value and Hall intensity value of the 3D Hall sensor. Compared to current automotive steering wheel combination switches, this method eliminates the need for metal springs and enables stable operation over extended periods.
[0019] Meanwhile, the automotive combination switch calibration system 1 based on 3D Hall sensors in this embodiment employs three displacement speeds to ensure that the system can quickly and accurately locate the calibration position. Specifically, firstly, before system calibration, the handle S1 of the automotive combination switch S is placed in the middle position between the upper toggle lever 41 and the lower toggle lever 42. Since the distance between the upper toggle lever 41, the lower toggle lever 42 and the handle S1 is relatively large, the toggle lever needs to quickly move to the initial position of the handle S1 of the combination switch; secondly, the data acquisition of the force sensor 5 has a certain delay, requiring the toggle lever to run at a low speed to find the zero contact position of the handle S1; finally, after the product finds the zero position of the toggle lever, it needs to quickly locate the calibration angle of the combination switch.
[0020] In summary, this application provides a vehicle combination switch detection system based on a 3D Hall sensor. A drive assembly drives a lead screw guide rail, causing the upper and lower levers to slide along the guide rail. This allows either the upper or lower lever to contact and push the handle of the vehicle combination switch. Simultaneously, an upper or lower force sensor collects the pushing force exerted by the upper or lower lever on the handle. This application determines the working range of the gear signal by reading the real-time angle and Hall intensity values of the 3D Hall sensor. This method eliminates the need for metal springs and allows for stable operation over extended periods. Furthermore, the vehicle combination switch calibration system based on the 3D Hall sensor employs a three-stage displacement speed to ensure rapid and accurate positioning to the calibration position. First, due to the significant distance between the upper and lower levers and the handle, the levers need to quickly move to the initial position of the combination switch handle. Second, the force sensor data acquisition has a certain delay, requiring the levers to move at a low speed to find the zero-position contact position of the handle. Finally, after finding the zero position of the lever, the system needs to quickly locate the calibration angle of the combination switch.
[0021] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0022] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.
Claims
1. A calibration system for automotive combination switches based on a 3D Hall sensor, characterized in that, include: Lead screw guides are installed on both sides of the automotive combination switch; The drive assembly is connected to the lead screw guide rail; An actuation component is disposed on the lead screw guide rail. The actuation component includes an upper toggle lever and a lower toggle lever. The upper toggle lever and the lower toggle lever are located on both sides of the automotive combination switch and correspond to the handle of the automotive combination switch. The drive component drives the lead screw guide rail to cause the upper toggle lever and the lower toggle lever to slide along the lead screw guide rail, so that the upper toggle lever or the lower toggle lever contacts and pushes the handle of the automotive combination switch. A sensor is disposed on the actuator, the sensor including an upper force sensor and a lower force sensor, the upper force sensor being disposed on the upper toggle lever and the lower force sensor being disposed on the lower toggle lever, the upper force sensor and the lower force sensor being used to collect the pushing force of the upper toggle lever or the lower toggle lever pushing the handle of the automotive combination switch.
2. The automotive combination switch calibration system based on a 3D Hall sensor according to claim 1, characterized in that, The drive assembly further includes a drive component, which is connected to the lead screw of the lead screw guide rail.
3. The automotive combination switch calibration system based on a 3D Hall sensor according to claim 2, characterized in that, The drive assembly includes a coupling, the drive component is connected to the input shaft of the coupling, and the output shaft of the coupling is connected to the lead screw of the lead screw guide rail.
4. The automotive combination switch calibration system based on a 3D Hall sensor according to claim 2, characterized in that, The drive unit uses a servo motor.
5. The automotive combination switch calibration system based on a 3D Hall sensor according to claim 1, characterized in that, The upper and lower levers are mounted on the lead screw guide rail via metal blocks.
6. The automotive combination switch calibration system based on a 3D Hall sensor according to claim 1, characterized in that, The upper and lower levers use cylindrical plastic rollers.
7. The automotive combination switch calibration system based on a 3D Hall sensor according to claim 1, characterized in that, When the upper and lower levers are in their initial positions, the handle of the automotive combination switch is located in the middle position between the upper and lower levers.
8. The automotive combination switch calibration system based on a 3D Hall sensor according to claim 1, characterized in that, The upper force sensor and the lower force sensor have a preset value. After the upper or lower lever contacts the handle of the car combination switch, the upper or lower force sensor collects the pushing force. When the pushing force is greater than the preset value, the position information of the upper or lower lever is recorded as the zero starting point of the corresponding lever, and the lever moves to the corresponding position according to the target gear calculated by the simulation software. After the upper or lower lever reaches the target gear, calibration data is written through the CANFD bus protocol.