A method for setting the boundary of a sub-dashboard suitable for the physiological characteristics of the Chinese human body

Abstract

The invention discloses a method for setting the size of a secondary instrument panel suitable for the physiological characteristics of the Chinese human body, belonging to the technical field of automobile layout design. The method sets the driver's seat height H30-1 in the whole vehicle coordinate system according to the positioning of the vehicle model and the benchmarking of the competitive product data, and sets the Y coordinate W20-1 of the driver in the width direction according to the width of the whole vehicle; and determines the position of the floor, the X coordinate of the driver's seat reference point (SgRP-1) and the torso angle (A40-1) of the driver in the driving state, sets the adjustment range of the driver's seat reference point (SgRP-1) and determines the driver's head space, etc.; and through comprehensive analysis of the physiological characteristics of the Chinese human body, creates a 3D human body model containing all body types in a target user group based on RAMSIS software, simulates the driving scenes of the driver's daily life, generates the driver's leg envelope in different scenes, and uses the leg envelope as the width boundary of the secondary instrument panel, so as to ensure that the width of the secondary instrument panel can meet the driving and riding needs of most Chinese human bodies.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile layout design, and in particular relates to a method for setting a sub-instrument panel boundary suitable for the physiological characteristics of the Chinese human body. Background Art

[0002] As society continues to develop, maximizing interior space is one of the main goals of automobile development. If the width of the sub-dashboard is too small, it will affect the visual luxury of the car. If the width of the sub-dashboard is too large, it will affect the leg space of the driver and co-driver, and even cause leg pain during driving. How to reasonably set the width of the sub-dashboard is one of the important tasks in the concept design stage of the car.

[0003] The feasibility analysis of the sub-dashboard boundary is closely related to automotive ergonomics, but ergonomics originated in developed countries in Europe and America, especially the United States, which has done a lot of mapping analysis and basic research on ergonomics. At present, the SAE-related standards used by most car companies are formulated by the United States. However, due to genetic and racial differences, there are obvious differences between the European and American and Chinese bodies. Europeans and Americans are tall and have long lower bodies, while Chinese people are shorter and have longer upper bodies. The European and American empirical formulas are not completely applicable to the Chinese body.

[0004] A similar document (CN 112284202 A) introduces a device and method for measuring the parameters of the passenger space in a car. The patent includes a dummy model, a mounting frame, a seat height measurement and R-point positioning ruler, a leg space measurement ruler, a head space measurement ruler, and a shoulder, elbow, and hip internal space measurement ruler. The patent can determine the position of the dummy in the car, measure the driver's leg space, and thus determine the boundary of the co-driver. However, the patent can be understood as an improved design based on the relevant SAE standards and is not completely applicable to the Chinese human body. Summary of the invention

[0005] In view of the above-mentioned problems existing in the prior art, the present invention provides a boundary method for the size of a sub-instrument panel that is suitable for the physiological characteristics of the Chinese human body. The method comprehensively analyzes the physiological characteristics of the Chinese human body, creates a 3D human body model of all body types in the target user group based on RAMSIS software, simulates the driving scenes of the driver's daily life, generates the driver's leg envelope in different scenes, and uses the leg envelope as the width boundary of the sub-instrument panel to ensure that the width of the sub-instrument panel can meet the driving and riding needs of the vast majority of Chinese people.

[0006] The present invention is achieved through the following technical solutions:

[0007] A method for setting the size of a sub-dashboard suitable for the physiological characteristics of the Chinese human body comprises the following steps:

[0008] Step 1: Set the driver's seat height H30-1 in the vehicle coordinate system according to the positioning of the vehicle model and the benchmarking of competitive product data, and set the driver's width direction Y coordinate W20-1 according to the width of the vehicle;

[0009] Step 2: Determine the position of the floor according to the vehicle height (H101) and ground clearance (H156) as well as the layout of chassis components, and then determine the position of the driver's heel point according to the thickness of the carpet and floor mats;

[0010] Step 3: Set the X coordinate of the driver's seat reference point (SgRP-1) and the driver's torso angle (A40-1) in the driving state according to the empirical formula;

[0011] Step 4: Refer to the benchmark vehicle and preliminarily set the adjustment range of the driver's seat reference point (SgRP-1); determine the driver's headroom (H61-1) based on the ceiling position; determine the position and adjustment range of the steering wheel based on the empirical formula;

[0012] Step 5: Through comprehensive analysis of the physiological characteristics of the Chinese human body, a 3D human body model of all body types in the target user group is created based on RAMSIS software;

[0013] Step 6: According to the set pedal position, heel point position, steering wheel grip area and roof position, constrain the 3D human body model, simulate the actual driving conditions and rest scenes to calculate the Chinese human driving posture N times, and extract the driver's leg envelope data; the collection of the obtained driver's leg envelope data is used as the minimum leg space required by the driver; and the leg space is offset outward by 30mm of safety gap, which is the boundary condition in the width direction of the auxiliary instrument panel.

[0014] Furthermore, step one is as follows: determine the size of the vehicle based on the vehicle model positioning and product strength relative to competing products. The driver's seat height H30-1 for sedans is set to 220-300mm, and the SUV H30-1 is set to 300-400mm; define the driver's Y coordinate W20-1 based on the initially defined vehicle width, and set the ratio of the driver's Y coordinate W20-1 to the vehicle width to 19%-21%.

[0015] Furthermore, step two is as follows: the ground clearance of the whole vehicle is usually related to the model. The fully loaded ground clearance of a sedan H156 is greater than 120mm, and the fully loaded ground clearance of an SUV is greater than 160mm. After the ground clearance is determined, the chassis parts are arranged. The chassis parts include a suspension system, a braking system, and a fuel system. The arrangement of the chassis parts must meet the ground clearance requirements. A safety gap of 10mm is set between the floor surface and the chassis parts. The floor surface is covered with a carpet layer. The carpet layer is set to a thickness of 30mm. The heel point has a 5mm compression on the carpet. The position of the heel point in the height direction can be obtained by deducing the dimension chain.

[0016] Further, step three is as follows: determine the X-direction distance L99-1 from the driver's step point to the seat reference point by referring to the SAE empirical formula, and determine the X coordinate of the driver's seat reference point:

[0017] L99-1=913.7+0.672316X(H30-1)-0.00195530X(H30-1)(H30-1)

[0018] Driver torso backrest angle:

[0019] A40-1=-0.024X(H30-1)+30°; ±1.5°;

[0020] After the human body is determined, the driver's stepping data can be obtained.

[0021] Further, step 4 is as follows: the adjustment range of the seat reference point is set with reference to the benchmark vehicle, and the front adjustment range of the seat reference point is: 200mm forward, 40mm backward; 30mm upward, 20mm downward;

[0022] The position of the car roof is related to the height of the vehicle. The distance between the roof with a sunroof and the roof is usually 80mm, and the distance between the roof without a sunroof and the roof is usually 40mm;

[0023] Driver headroom H61-1 Refer to SAE definition, sedan>950mm, SUV>965mm;

[0024] Refer to the empirical formula to determine the position of the steering wheel:

[0025] The calculation formula of the X coordinate of the steering wheel center SWC relative to the pedal point is as follows:

[0026] Sedan (200<H30<300) SWCx=(-0.0029*(H30-1) 2 +0.9392*(H30-1)+500)±10;

[0027] SUV(300<H30<400)SWCx=(-0.0029*(H30-1) 2 +0.9392*(H30-1)+515)±10;

[0028] The Z coordinate of the steering wheel center SWC relative to the seat reference point is calculated as follows:

[0029] Sedan (200<H30<300) SWCz=(-0.2674*(H30-1)+443.96)±10;

[0030] SUV(300<H30<400)SWCz=(-0.2674*(H30-1)+449)±10;

[0031] The adjustment range of the steering wheel height is set to 30mm up and down.

[0032] Furthermore, the step five specifically includes the following process:

[0033] The driver's posture is determined based on the driver's seat height, the range of the driver's seat reference point (SgRP-1), steering wheel position, floor height and ceiling height determined by RAMSIS software. The driver's 3D human body model is created by comprehensively considering the target user's gender, height, body proportions and waist circumference, including 90 types of human body models for China.

[0034] Compared with the prior art, the advantages of the present invention are as follows:

[0035] 1. The present invention creates 90 types of Chinese human body models based on RAMSIS software, and generates human driving postures and seat reference point coordinates by simulating actual driving conditions.

[0036] 2. The method for setting the size of the auxiliary instrument panel suitable for the physiological characteristics of the Chinese human body is more suitable for the Chinese human body in vehicle development, which helps to improve driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0038] Figure 1 The present invention is a flow chart of a method for setting the size of a sub-dashboard suitable for the physiological characteristics of the Chinese human body. DETAILED DESCRIPTION

[0039] In order to clearly and completely describe the technical solution and its specific working process of the present invention, the specific implementation methods of the present invention are as follows in conjunction with the accompanying drawings of the specification:

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0043] Example 1

[0044] A method for setting the size of a sub-dashboard suitable for the physiological characteristics of the Chinese human body comprises the following steps:

[0045] Step 1: Set the driver's seat height H30-1 in the vehicle coordinate system according to the positioning of the vehicle model and the benchmarking of competitive product data, and set the driver's width direction Y coordinate W20-1 according to the width of the vehicle;

[0046] Step 2: Determine the position of the floor according to the vehicle height (H101) and ground clearance (H156) as well as the layout of chassis components, and then determine the position of the driver's heel point according to the thickness of the carpet and floor mats;

[0047] Step 3: Set the X coordinate of the driver's seat reference point (SgRP-1) and the driver's torso angle (A40-1) in the driving state according to the empirical formula;

[0048] Step 4: Refer to the benchmark vehicle and preliminarily set the adjustment range of the driver's seat reference point (SgRP-1); determine the driver's headroom (H61-1) based on the ceiling position; determine the position and adjustment range of the steering wheel based on the empirical formula;

[0049] Step 5: Through comprehensive analysis of the physiological characteristics of the Chinese human body, a 3D human body model of all body types in the target user group is created based on RAMSIS software;

[0050] Step 6: According to the set pedal position, heel point position, steering wheel grip area and roof position, constrain the 3D human body model, simulate the actual driving conditions and rest scenes to calculate the Chinese human driving posture N times, and extract the driver's leg envelope data; the collection of the obtained driver's leg envelope data is used as the minimum leg space required by the driver; and the leg space is offset outward by 30mm of safety gap, which is the boundary condition in the width direction of the auxiliary instrument panel.

[0051] Step 1 is as follows: Determine the size of the vehicle based on the vehicle model positioning and product strength relative to competing products. The driver's seat height H30-1 for sedans is set to 220-300mm, and the SUV H30-1 is set to 300-400mm; define the driver's Y coordinate W20-1 based on the initial defined vehicle width, and set the ratio of the driver's Y coordinate W20-1 to the vehicle width to 19%-21%.

[0052] Step 2 is as follows: The ground clearance of the whole vehicle is usually related to the model. The ground clearance of a fully loaded sedan H156 is greater than 120mm, and the ground clearance of a fully loaded SUV is greater than 160mm. After the ground clearance is determined, the chassis parts are arranged. The chassis parts include the suspension system, braking system, and fuel system. The arrangement of the chassis parts must meet the ground clearance requirements. A safety gap of 10mm is set between the floor surface and the chassis parts. The floor surface is covered with a carpet layer with a thickness of 30mm. The heel point has a 5mm compression on the carpet. The position of the heel point in the height direction can be obtained by deducing the dimension chain.

[0053] Step 3 is as follows: Determine the X-direction distance L99-1 from the driver's footstep to the seat reference point by referring to the SAE empirical formula, and determine the X coordinate of the driver's seat reference point:

[0054] L99-1=913.7+0.672316X(H30-1)-0.00195530X(H30-1)(H30-1)

[0055] Driver torso backrest angle:

[0056] A40-1=-0.024X(H30-1)+30°; ±1.5°;

[0057] After the human body is determined, the driver's stepping data can be obtained.

[0058] Step 4 is as follows: The adjustment range of the seat reference point is set with reference to the benchmark vehicle. The front adjustment range of the seat reference point is: 200mm forward, 40mm backward; 30mm upward, 20mm downward;

[0059] The position of the car roof is related to the height of the vehicle. The distance between the roof with a sunroof and the roof is usually 80mm, and the distance between the roof without a sunroof and the roof is usually 40mm;

[0060] Driver headroom H61-1 Refer to SAE definition, sedan>950mm, SUV>965mm;

[0061] Refer to the empirical formula to determine the position of the steering wheel:

[0062] The calculation formula of the X coordinate of the steering wheel center SWC relative to the pedal point is as follows:

[0063] Sedan (200<H30<300) SWCx=(-0.0029*(H30-1) 2 +0.9392*(H30-1)+500)±10;

[0064] SUV(300<H30<400)SWCx=(-0.0029*(H30-1) 2 +0.9392*(H30-1)+515)±10;

[0065] The Z coordinate of the steering wheel center SWC relative to the seat reference point is calculated as follows:

[0066] Sedan (200<H30<300) SWCz=(-0.2674*(H30-1)+443.96)±10;

[0067] SUV(300<H30<400)SWCz=(-0.2674*(H30-1)+449)±10;

[0068] The adjustment range of the steering wheel height direction is set to 30mm up and down;

[0069] The step five specifically includes the following process:

[0070] The driver's posture is determined based on the driver's seat height, the range of the driver's seat reference point (SgRP-1), steering wheel position, floor height and ceiling height determined by RAMSIS software. The driver's 3D human body model is created by comprehensively considering the target user's gender, height, body proportions and waist circumference, including 90 types of human body models for China.

[0071] Example 2

[0072] A method for setting the size of a sub-dashboard suitable for the physiological characteristics of the Chinese human body comprises the following steps:

[0073] first step:

[0074] A certain model was initially defined as a compact sedan, with vehicle dimensions of 4810*1840*1455mm;

[0075] The seat height H30-1 is 260 mm, and the driver's Y coordinate W20-1 is 365 (365 / 1840=19.84%);

[0076] Step 2:

[0077] The minimum ground clearance of a certain model when fully loaded is 120mm, the gap between the fuel tank and the floor is 10mm, the carpet thickness is 30mm and the heel point compression is 5mm; the Z coordinate of the driver's heel point is derived as 978;

[0078] Step 3:

[0079] According to the SAE empirical formula, the X-direction distance from the step point to the H point is:

[0080] L99-1=913.7+0.672316X(260)-0.00195530X(260)(260)=956.3;

[0081] Front driver's seat back angle:

[0082] A40-1=-0.024X(H30-1)+30°=23.76°;

[0083] The final definition is 25°;

[0084] Step 4:

[0085] The seat of a certain model uses a mature frame that can be adjusted 200mm forward and 40mm backward; 34mm upward and 22mm downward;

[0086] Step 5:

[0087] The thickness of the roof of a certain model (with sunroof) is 72mm, and the front headroom H61-1 is 955mm;

[0088] The calculated value of the X coordinate of the steering wheel center SWC relative to the pedal point is:

[0089] SWCx=(-0.0029*(H30-1) 2 +0.9392*(H30-1)+500)=548;

[0090] SWCz=(-0.2674*(H30-1)+449)=379.5;

[0091] Actual value SWCx = 550 SWCz = 381;

[0092] The actual value is basically consistent with the calculated value;

[0093] Borrowing the proven steering column, it can be adjusted 25mm upwards and 26mm downwards;

[0094] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0095] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0096] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A method for setting the size of a sub-dashboard suitable for the physiological characteristics of the Chinese human body, characterized in that: The specific steps include: Step 1: Set the driver's seat height H30-1 in the vehicle coordinate system according to the positioning of the vehicle model and the benchmarking of competitive product data, and set the driver's width direction Y coordinate W20-1 according to the width of the vehicle; Step 2: Determine the position of the floor according to the vehicle height (H101) and ground clearance (H156) as well as the layout of chassis components, and then determine the position of the driver's heel point according to the thickness of the carpet and floor mats; Step 3: Set the X coordinate of the driver's seat reference point (SgRP-1) and the driver's torso angle (A40-1) in the driving state according to the empirical formula; Step 4: Refer to the benchmark vehicle and preliminarily set the adjustment range of the driver's seat reference point (SgRP-1); determine the driver's headroom (H61-1) based on the ceiling position; determine the position and adjustment range of the steering wheel based on the empirical formula; Step 5: Through comprehensive analysis of the physiological characteristics of the Chinese human body, a 3D human body model of all body types in the target user group is created based on RAMSIS software; Step 6: According to the set pedal position, heel point position, steering wheel grip area and roof position, constrain the 3D human body model, simulate the actual driving conditions and rest scenes to calculate the Chinese human driving posture N times, and extract the driver's leg envelope data; the collection of the obtained driver's leg envelope data is used as the minimum leg space required by the driver; The legroom is offset outward by a safety gap of 30 mm, which serves as the boundary condition in the width direction of the auxiliary instrument panel.

2. A method for setting the size of a sub-dashboard suitable for the physiological characteristics of the Chinese human body as claimed in claim 1, characterized in that: Step one is as follows: Determine the size of the vehicle based on the vehicle model positioning and product strength relative to competing products; set the driver's seat height H30-1 of a sedan to 220-300mm, and set the SUV H30-1 to 300-400mm; define the driver's Y coordinate W20-1 based on the initially defined vehicle width, and set the ratio of the driver's Y coordinate W20-1 to the vehicle width to 19%-21%.

3. The method for setting the size of the auxiliary instrument panel suitable for the physiological characteristics of the Chinese human body as claimed in claim 1, characterized in that: Step 2 is as follows: The ground clearance of the whole vehicle is usually related to the model. The ground clearance of a fully loaded sedan H156 is greater than 120mm, and the ground clearance of a fully loaded SUV is greater than 160mm. After the ground clearance is determined, the chassis parts are arranged. The chassis parts include the suspension system, braking system, and fuel system. The arrangement of the chassis parts must meet the ground clearance requirements. A safety gap of 10mm is set between the floor surface and the chassis parts. The floor surface is covered with a carpet layer with a thickness of 30mm. The heel point has a 5mm compression on the carpet. The position of the heel point in the height direction can be obtained by deducing the dimension chain.

4. The method for setting the size of the auxiliary instrument panel suitable for the physiological characteristics of the Chinese human body as claimed in claim 1, characterized in that: Step 3 is as follows: Determine the X-direction distance L99-1 from the driver's footstep to the seat reference point by referring to the SAE empirical formula, and determine the X coordinate of the driver's seat reference point: L99-1=913.7+0.672316X(H30-1)-0.00195530X(H30-1)(H30-1) Driver torso backrest angle: A40-1=-0.024X(H30-1)+30°; ±1.5°; After the human body is determined, the driver's stepping data can be obtained.

5. The method for setting the size of the auxiliary instrument panel suitable for the physiological characteristics of the Chinese human body as claimed in claim 1, characterized in that: Step 4 is as follows: The adjustment range of the seat reference point is set with reference to the benchmark vehicle. The front adjustment range of the seat reference point is: 200mm forward, 40mm backward; 30mm upward, 20mm downward; The position of the car roof is related to the height of the vehicle. The distance between the roof with a sunroof and the roof is usually 80mm, and the distance between the roof without a sunroof and the roof is usually 40mm; Driver headroom H61-1 Refer to SAE definition, sedan>950mm, SUV>965mm; Refer to the empirical formula to determine the position of the steering wheel: The calculation formula of the X coordinate of the steering wheel center SWC relative to the pedal point is as follows: Sedan (200<H30<300) SWCx=(-0.0029*(H30-1) 2 +0.9392*(H30-1)+500)±10; SUV(300<H30<400)SWCx=(-0.0029*(H30-1) 2 +0.9392*(H30-1)+515)±10; The Z coordinate of the steering wheel center SWC relative to the seat reference point is calculated as follows: Sedan (200<H30<300) SWCz=(-0.2674*(H30-1)+443.96)±10; SUV(300<H30<400)SWCz=(-0.2674*(H30-1)+449)±10; The adjustment range of the steering wheel height is set to 30mm up and down.

6. The method for setting the size of the auxiliary instrument panel suitable for the physiological characteristics of the Chinese human body as claimed in claim 1, characterized in that: The step five specifically includes the following process: The driver's posture is determined based on the driver's seat height, the range of the driver's seat reference point (SgRP-1), steering wheel position, floor height and ceiling height determined by RAMSIS software. The driver's 3D human body model is created by comprehensively considering the target user's gender, height, body proportions and waist circumference, including 90 types of human body models for China.

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