Simulation test device for hand-leaving detection of steering wheel

Abstract

The utility model discloses a simulation test device for hand-leaving detection of a steering wheel, and relates to the technical field of steering wheel detection. The bottom plate is provided with a fixing frame corresponding to the electric adjusting seat, and the electric adjusting seat is installed on the fixing frame; the bottom end of the mounting frame is fixedly connected with the bottom plate; the bottom end of the connecting shaft is fixedly connected with the mounting frame; the testing steering wheel is rotationally mounted at the top end of the connecting shaft; the testing steering wheel comprises a wheel flange, the wheel flange comprises a circular metal framework, and the circular metal framework is sequentially sleeved with insulating foam, an HOD detection line and an insulating skin from inside to outside. The HOD controller is fixedly arranged on the testing steering wheel and comprises a micro-control unit, a communication transceiver, an HOD sensor and a filter, and the HOD sensor, the filter and an HOD detection line are electrically connected in sequence; and the power supply and the circular metal framework are electrically connected with the GND. And the steering wheel hand-leaving detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steering wheel detection, in particular to a simulation test device for steering wheel hand-off detection. Background Art

[0002] With the continuous development of technology, autonomous driving has become an important trend in the future development of automobiles. During the process of autonomous driving, judging whether the driver's hand is on the steering wheel is one of the key judgment conditions for the advanced driver assistance system (ADAS). Currently, the common steering wheel hand-off detection (HOD) on the market is mainly divided into three categories: capacitive, pressure type, and torque type. There are certain differences in the application principles of these three detection methods.

[0003] Among them, capacitive steering wheel hand-off detection is achieved through a specific induction principle. The HOD controller sends a carrier signal to the sensing wire arranged on the steering wheel. When a hand holds the steering wheel, there are differences in aspects such as modulus and phase between the carrier signal received by the HOD controller and the sent carrier signal. After the IQ algorithm, a change amount is output. According to the magnitude of the output change amount, it can be judged how many fingers, one hand, or both hands are holding the steering wheel. And to determine the change amount corresponding to one finger, one hand, or both hands, it is necessary to calibrate through a test bench, record and summarize according to various gestures of men and women, and set the change amount thresholds for different gestures.

[0004] However, in the research and development, testing, debugging, calibration and other stages of capacitive HOD, there is a lack of an effective simulation device to provide a simulation test platform for the realization of the productization of the solution, so as to ensure the smooth implementation of the product. Content of the Utility Model

[0005] The purpose of the utility model is to provide a simulation test device for steering wheel hand-off detection, so as to solve the problems existing in the above-mentioned prior art, provide a simulation test platform for the research and development, testing, debugging, calibration and other stages of capacitive HOD, and improve the efficiency of steering wheel hand-off detection.

[0006] To achieve the above purpose, the utility model provides the following scheme:

[0007] The utility model provides a simulation test device for steering wheel hand-off detection, including:

[0008] A bottom plate;

[0009] An electric adjustable seat, a fixing frame is arranged on the bottom plate corresponding to the electric adjustable seat, and the electric adjustable seat is installed on the fixing frame;

[0010] An installation frame, the bottom end of the installation frame is fixedly connected to the bottom plate;

[0011] An inclined connecting shaft, the bottom end of the connecting shaft is fixedly connected to the mounting frame, and the top end of the connecting shaft is closer to the electric adjustable seat than the bottom end of the connecting shaft;

[0012] A test steering wheel, the test steering wheel is rotatably mounted at the top end of the connecting shaft; the test steering wheel includes a rim, the rim includes a circular metal skeleton, and an insulating foam, a HOD detection line and an insulating skin are sequentially sleeved on the circular metal skeleton from the inside to the outside;

[0013] A HOD controller fixedly arranged on the test steering wheel, the HOD controller includes a micro control unit, a communication transceiver, a HOD sensor and a filter, the communication transceiver and the HOD sensor are respectively signal-connected to the micro control unit, the HOD sensor, the filter and the HOD detection line are sequentially electrically connected, and the communication transceiver is used for communicating and connecting with a CAN-USB module in an upper computer;

[0014] A power supply, the micro control unit, the communication transceiver, the HOD sensor, the filter and the electric adjustable seat are respectively electrically connected to the power supply, and the circular metal skeleton is electrically connected to the GND of the power supply.

[0015] Preferably, at least three moving wheels are installed under the bottom plate.

[0016] Preferably, the moving wheels are brake universal wheels.

[0017] Preferably, the number of the moving wheels is four, and they are distributed at the four corners of the bottom plate.

[0018] Preferably, the mounting frame includes an inclined frame and two spaced connecting plates, the two connecting plates are respectively attached to and fixedly connected to the bottom plate, and the two connecting plates are respectively fixedly connected to the bottom end of the inclined frame.

[0019] Preferably, the included angle between the inclined frame and the bottom plate is 45°.

[0020] Preferably, the inclination angle of the connecting shaft is 45°.

[0021] Preferably, the material of the bottom plate is metal.

[0022] Preferably, a clutch simulation pedal, a brake simulation pedal and an accelerator simulation pedal are also hinged on the mounting frame; one end of a first torsion spring abuts against the mounting frame and the other end abuts against the clutch simulation pedal; one end of a second torsion spring abuts against the mounting frame and the other end abuts against the brake simulation pedal; one end of a third torsion spring abuts against the mounting frame and the other end abuts against the accelerator simulation pedal.

[0023] Preferably, a bolt is fixedly provided at the top end of the connecting shaft, and the bolt is coaxial with the connecting shaft; a through hole is provided at the center of the test steering wheel corresponding to the bolt, the bolt passes through the through hole, and a nut is threadedly connected to the bolt, and the through hole is located between the connecting shaft and the nut.

[0024] The utility model has achieved the following technical effects compared with the prior art:

[0025] The simulation test device for steering wheel hand-off detection provided by the utility model can adjust the front-back position, height and backrest of the seat, and the driving environment is consistent with the real vehicle environment, so that HOD data can be collected more accurately and the reliability of the data can be improved.

[0026] Furthermore, connect the GND of the power supply to the circular metal skeleton to ensure that the circular metal skeleton is at 0 potential. When sending the carrier signal, the sensor detects the mode and phase based on the data read with reference to 0 potential, thus ensuring that the external design environment is consistent with the internal detection mechanism of the sensor and guaranteeing the accuracy, effectiveness and reliability of the data. In this way, during the HOD acquisition / calibration process, the data has a stable reference, and the sensor can sense a stable data change amount, so as to accurately judge the effective hand-holding state.

[0027] Furthermore, at least three moving wheels are installed under the bottom plate, which facilitates the movement of the simulation test device and improves the operability of the equipment.

[0028] Furthermore, brake universal wheels are adopted, which can fix the position of the simulation test device when needed to ensure the stability of the test process. The four moving wheels are distributed at the four corners of the bottom plate, further improving the stability of the equipment.

[0029] Furthermore, the design of the inclined frame and the connecting plate of the mounting rack provides stable support for the connecting shaft and the test steering wheel. The included angle between the inclined frame and the bottom plate and the inclination angle of the connecting shaft are optimized, making it more ergonomic for the tester to operate the test steering wheel and improving the comfort and accuracy of the operation.

[0030] Furthermore, the design of the circular metal skeleton, insulating foam, HOD detection line and insulating skin of the wheel rim ensures that the HOD sensor can accurately detect the state of holding the steering wheel. Components such as the micro control unit, communication transceiver, HOD sensor and filter of the HOD controller work together to realize the communication connection with the host computer, improving the automation and intelligence level of the test.

[0031] Furthermore, the clutch simulation pedal, brake simulation pedal and accelerator simulation pedal hinged on the mounting rack, as well as the corresponding torsion spring design, further simulate the real vehicle driving environment and improve the authenticity and comprehensiveness of the test.

[0032] Further, the connecting shaft is inclined at 45°, enabling the tester to test at the optimal angle.

[0033] The simulation test device for steering wheel hand-off detection of the present utility model has various technical effects such as accurate data acquisition, strong mobility, and comfortable operation, providing an effective solution for the research, testing, debugging, and calibration of capacitive steering wheel hand-off detection, and improving the efficiency of steering wheel hand-off detection. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0035] Figure 1 It is a schematic structural diagram of the simulation test device for steering wheel hand-off detection of the present utility model;

[0036] Figure 2 It is a schematic cross-sectional view of the rim of the test steering wheel of the simulation test device for steering wheel hand-off detection of the present utility model;

[0037] Figure 3 It is a schematic diagram of the communication link of the simulation test device for steering wheel hand-off detection of the present utility model;

[0038] In the figure: 1, bottom plate; 2, fixing frame; 3, moving wheel; 4, electric adjustable seat; 5, power supply; 6, inclined frame; 7, connecting plate; 8, connecting shaft; 9, test steering wheel; 10, nut; 11, bolt; 12, circular metal skeleton; 13, insulating foam; 14, HOD detection line; 15, insulating skin; 16, micro control unit; 17, HOD sensor; 18, filter; 19, communication transceiver; 20, CAN-USB module; 21, host computer; 22, first torsion spring; 23, clutch simulation pedal. Detailed Embodiments

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0040] The purpose of the present utility model is to provide a simulation test device for detecting the release of the hand from the steering wheel, so as to solve the problems existing in the above-mentioned prior art, provide a simulation test platform for the research and development, testing, debugging, calibration and other stages of capacitive HOD, and improve the efficiency of detecting the release of the hand from the steering wheel.

[0041] In order to make the above-mentioned objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] As Figures 1 to 3 shown, this embodiment provides a simulation test device for detecting the release of the hand from the steering wheel, including:

[0043] Base plate 1;

[0044] Electrically adjustable seat 4, a fixing frame 2 is arranged on the base plate 1 corresponding to the electrically adjustable seat 4, and the electrically adjustable seat 4 is installed on the fixing frame 2;

[0045] Mounting frame, the bottom end of the mounting frame is fixedly connected to the base plate 1;

[0046] Inclined connecting shaft 8, the bottom end of the connecting shaft 8 is fixedly connected to the mounting frame, and the top end of the connecting shaft 8 is closer to the electrically adjustable seat 4 than the bottom end of the connecting shaft 8;

[0047] Test steering wheel 9, the test steering wheel 9 is rotatably installed at the top end of the connecting shaft 8; the test steering wheel 9 includes a rim, and the rim includes a circular metal skeleton 12, on which an insulating foam 13, an HOD detection line 14 and an insulating skin 15 are sequentially sleeved from the inside to the outside;

[0048] HOD controller fixedly arranged on the test steering wheel 9, the HOD controller includes a micro control unit 16, a communication transceiver 19, an HOD sensor 17 and a filter 18, the communication transceiver 19 and the HOD sensor 17 are respectively signal-connected to the micro control unit 16, the HOD sensor 17, the filter 18 and the HOD detection line 14 are electrically connected in sequence, and the communication transceiver 19 is used for communicating with the CAN-USB module 20 in the upper computer 21;

[0049] Power supply 5, the micro control unit 16, the communication transceiver 19, the HOD sensor 17, the filter 18 and the electrically adjustable seat 4 are respectively electrically connected to the power supply 5, and the circular metal skeleton 12 is electrically connected to the GND of the power supply 5.

[0050] It should be noted that the power-adjustable seat 4 can adjust the front-back position, up-down height, and backrest angle of the seat through the control of the motor. It is a well-known and mature component in the automotive field, and the specific structure and working principle of the power-adjustable seat 4 will not be elaborated in the embodiments. By adopting the power-adjustable seat 4 in this embodiment, it can be applicable to testers of different body sizes and facilitate the testers to conduct tests in various postures.

[0051] In this embodiment, connecting the GND of the power supply 5 to the circular metal skeleton 12 can ensure that the circular metal skeleton 12 is at 0 potential. When sending the carrier signal, the sensor detects the modulus and phase based on the data read when referring to 0 potential, thereby ensuring that the external design environment is consistent with the internal detection mechanism of the sensor and guaranteeing the accuracy, effectiveness, and reliability of the data. In this way, during the HOD acquisition / calibration process, the data has a stable reference, and the sensor can sense a stable data change amount, thereby accurately judging the effective hand-holding state.

[0052] In an alternative embodiment of this embodiment, preferably, at least three moving wheels 3 are installed below the bottom plate 1. Installing at least three moving wheels 3 below the bottom plate 1 facilitates the movement of the simulation test device and improves the operability of the equipment.

[0053] In this embodiment, a more preferred solution is:

[0054] The moving wheels 3 are brake universal wheels, and the number of the moving wheels 3 is four, which are distributed at the four corners of the bottom plate 1. By using brake universal wheels, the position of the simulation test device can be fixed when needed to ensure the stability of the test process. The four moving wheels 3 are distributed at the four corners of the bottom plate 1, further improving the stability of the equipment.

[0055] In an alternative embodiment of this embodiment, preferably, the mounting bracket includes an inclined frame 6 and two connecting plates 7 arranged at intervals. The two connecting plates 7 are respectively attached to and fixedly connected to the bottom plate 1, and the two connecting plates 7 are respectively fixedly connected to the bottom end of the inclined frame 6; the included angle between the inclined frame and the bottom plate 1 is 45°. The design of the inclined frame 6 and the connecting plates 7 of the mounting bracket provides stable support for the connecting shaft 8 and the test steering wheel 9. The included angle between the inclined frame and the bottom plate 1 and the inclination angle of the connecting shaft 8 are optimized, making it more ergonomic for the tester to operate the test steering wheel 9 and improving the comfort and accuracy of the operation.

[0056] In an alternative embodiment of this embodiment, preferably, the inclination angle of the connecting shaft 8 is 45°; the top end of the connecting shaft 8 is closer to the power-adjustable seat 4 than the bottom end of the connecting shaft 8, and making the inclination angle of the connecting shaft 8 45° can facilitate the tester to conduct tests at the best angle.

[0057] In an alternative embodiment of the present embodiment, preferably, the material of the bottom plate 1 is metal, and the metal bottom plate 1 provides sufficient strength.

[0058] In an alternative embodiment of the present embodiment, preferably, a clutch simulation pedal 23, a brake simulation pedal, and an accelerator simulation pedal are also hinged on the mounting bracket; one end of the first torsion spring 22 abuts against the mounting bracket, and the other end abuts against the clutch simulation pedal 23; one end of the second torsion spring abuts against the mounting bracket, and the other end abuts against the brake simulation pedal; one end of the third torsion spring abuts against the mounting bracket, and the other end abuts against the accelerator simulation pedal. The layout of the clutch simulation pedal 23, the brake simulation pedal, and the accelerator simulation pedal is the same as the layout of each pedal on an automobile; the clutch simulation pedal 23, the brake simulation pedal, and the accelerator simulation pedal hinged on the mounting bracket, and the corresponding torsion spring design further simulate the real vehicle driving environment, improving the authenticity and comprehensiveness of the test.

[0059] In an alternative embodiment of the present embodiment, preferably, a bolt 11 is fixedly provided at the top end of the connecting shaft 8, and the bolt 11 is coaxial with the connecting shaft 8; a through hole is provided corresponding to the bolt 11 at the center of the test steering wheel 9, the bolt 11 passes through the through hole, and a nut 10 is threadedly connected to the bolt 11, and the through hole is located between the connecting shaft 8 and the nut 10. In this embodiment, an M8 screw and the nut 10 are used, which can adapt to the installation of steering wheels with various apertures.

[0060] The specific working principle of the simulation test device for detecting the departure of the hand from the steering wheel in this embodiment is as follows:

[0061] The HOD controller starts to work, and the micro control unit 16 controls the HOD sensor 17 to send a carrier signal to the HOD detection line 14 arranged on the steering wheel, and the carrier signal passes through the filter circuit and reaches the HOD detection line 14 on the steering wheel;

[0062] When the tester holds the test steering wheel 9, the phase and modulus of the sent carrier wave will change; the changed signal passes through the filter 18 and then is read back to the HOD sensor 17.

[0063] The HOD sensor 17 will judge the grasping state of the hand according to the magnitude of the phase and modulus changes, such as operations like three-finger grasping, single-handed grasping, and two-handed grasping. The detection result will be sent to the upper computer 21 through the communication transceiver 19 and the CAN-USB module 20 for data recording and analysis.

[0064] During the test, the tester can simulate different driving operations, such as single-handed steering, two-handed steering, and empty steering, etc., to comprehensively test the performance of the capacitive steering wheel departure detection system.

[0065] The clutch simulation pedal 23, brake simulation pedal, and accelerator simulation pedal on the mounting bracket can also be used to further simulate the real vehicle driving environment for more comprehensive testing.

[0066] Specific examples are used in the present utility model to illustrate the principles and implementation manners of the present utility model. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. An analog test device for detecting the release of the hand from the steering wheel, characterized in that, Comprising: Bottom plate; Electrically adjustable seat, a fixing frame is provided on the bottom plate corresponding to the electrically adjustable seat, and the electrically adjustable seat is mounted on the fixing frame; Mounting frame, the bottom end of the mounting frame is fixedly connected to the bottom plate; Inclined connecting shaft, the bottom end of the connecting shaft is fixedly connected to the mounting frame, and the top end of the connecting shaft is closer to the electrically adjustable seat than the bottom end of the connecting shaft; Test steering wheel, the test steering wheel is rotatably mounted on the top end of the connecting shaft; the test steering wheel includes a rim, the rim includes a circular metal skeleton, and an insulating foam, a HOD detection wire and an insulating skin are sequentially sleeved on the circular metal skeleton from the inside to the outside; HOD controller fixedly arranged on the test steering wheel, the HOD controller includes a micro control unit, a communication transceiver, a HOD sensor and a filter, the communication transceiver and the HOD sensor are respectively signal-connected to the micro control unit, the HOD sensor, the filter and the HOD detection wire are sequentially electrically connected, and the communication transceiver is used for communicating and connecting with the CAN-USB module in the upper computer; Power supply, the micro control unit, the communication transceiver, the HOD sensor, the filter and the electrically adjustable seat are respectively electrically connected to the power supply, and the circular metal skeleton is electrically connected to the GND of the power supply.

2. The analog test device for detecting the departure of the hand from the steering wheel according to claim 1, wherein: At least three moving wheels are installed below the bottom plate.

3. The analog test device for detecting the departure of the hand from the steering wheel according to claim 2, characterized in that: The moving wheels adopt brake universal wheels.

4. The analog test device for detecting the departure of the hand from the steering wheel according to claim 3, characterized in that: The number of the moving wheels is four, and they are distributed at the four corners of the bottom plate.

5. The analog test device for detecting the departure of the hand from the steering wheel according to claim 1, characterized in that: The mounting frame includes an inclined frame and two spaced connecting plates, the two connecting plates are respectively attached to and fixedly connected to the bottom plate, and the two connecting plates are respectively fixedly connected to the bottom end of the inclined frame.

6. The analog test device for detecting the release of the hand from the steering wheel according to claim 5, characterized in that: The included angle between the inclined frame and the bottom plate is 45°.

7. The analog test device for detecting the departure of the hand from the steering wheel according to claim 1, characterized in that: The inclination angle of the connecting shaft is 45°.

8. The analog test device for detecting the release of the hand from the steering wheel according to claim 1, characterized in that: The material of the bottom plate is metal.

9. The analog test device for detecting the departure of a hand from a steering wheel according to claim 1, characterized in that: A clutch simulation pedal, a brake simulation pedal and an accelerator simulation pedal are also hinged on the mounting frame; one end of a first torsion spring abuts against the mounting frame and the other end abuts against the clutch simulation pedal; one end of a second torsion spring abuts against the mounting frame and the other end abuts against the brake simulation pedal; one end of a third torsion spring abuts against the mounting frame and the other end abuts against the accelerator simulation pedal.

10. The analog test device for detecting the leaving of the hand from the steering wheel according to claim 1, wherein: A bolt is fixedly arranged at the top end of the connecting shaft, and the bolt is coaxial with the connecting shaft; a through hole is provided at the center of the test steering wheel corresponding to the bolt, the bolt passes through the through hole, and a nut is threadedly connected to the bolt, and the through hole is located between the connecting shaft and the nut.

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