1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
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4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/J1052_201710 SURFACE VEHICLE STANDARD J1052 OCT2017 Issued 1974-08 Revised 2017-10 Superseding
5、J1052 SEP2010 Motor Vehicle Driver and Passenger Head Position RATIONALE This revision clarifies the basis of the head position contour shape and adds a locating procedure for Front Passenger head position contours to Appendix C. In addition, definitions were added referring to SAE J941 and updated
6、to align with SAE J1100, and in Section 7.2, the coefficient of A40 was corrected (used to calculate the side view fixed seat eyellipse angle). TABLE OF CONTENTS 1. SCOPE . 2 2. References . 2 2.1 Applicable Documents . 2 2.1.1 SAE Publications 2 3. DEFINITIONS 3 4. USING THE HEAD POSITION CONTOURS
7、IN DESIGN . 3 5. SELECTING THE CORRECT HEAD POSITION CONTOUR . 4 5.1 H-Point Travel Path, TL23 4 5.2 Accommodation Percentile Values 4 5.3 Occupant Seat Location . 4 5.3.1 Front Row . 4 5.3.2 Second and Succeeding Rows 4 6. HEAD POSITION CONTOUR GEOMETRY 4 6.1 Construct an Ellipsoid 4 6.2 Discard Lo
8、wer Half . 5 6.3 Extend Contour, Driver and Front Row Outboard Passenger Only . 5 6.4 Orient Axes 6 7. LOCATING HEAD POSITION CONTOURS IN CLASS A VEHICLES 6 7.1 Locating from Cyclopean Eyellipse Centroid . 6 7.2 Locating from Vehicle Grid . 6 8. ASSESSING HEAD CLEARANCE 7 SAE INTERNATIONAL J1052 OCT
9、2017 Page 2 of 16 9. BIBLIOGRAPHy . 10 10. NOTES . 10 10.1 Revision Indcator . 10 APPENDIX A Development of Head Position Contours . 11 APPENDIX B Procedure for Class B Vehicles . 14 APPENDIX C Procedure for FRONT PASSENGERS 16 Figure 1 Development in side view of head position contour by spotting e
10、ye reference of mean head around eyellipse . 8 Figure 2 Head position contours for Class A vehicles with fixed seats 8 Figure 3 Driver head position contours for Class A vehicles with seat track travel greater than 133 mm . 9 Figure 4 Minimum head clearance . 9 Table 1 Ellipsoid axes dimensions (mm)
11、 5 Table 2 95th Percentile head position contour dimensions: distance from ellipsoid centroid to outer edge of the head position contour (mm) . 5 Table 3 99th Percentile head position contour dimensions: distance from ellipsoid centroid to outer edge of the head position contour (mm) . 6 Table 4 Dis
12、tance from cyclopean eyellipse centroid (SAE J941) to head contour ellipsoid centroid (mm) 6 Table 5 Head contour ellipsoid centroid relative to vehicle grid (mm) 7 1. SCOPE This SAE Standard describes head position contours and procedures for locating the contours in a vehicle. Head position contou
13、rs are useful in establishing accommodation requirements for head space and are required for several measures defined in SAE J1100. Separate contours are defined depending on occupant seat location and the desired percentage (95 and 99) of occupant accommodation. This document is primarily focused o
14、n application to Class A vehicles (see SAE J1100), which include most personal-use vehicles (passenger cars, sport utility vehicles, pick-up trucks). A procedure for use in Class B vehicles can be found in Appendix B. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of t
15、his specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (ou
16、tside USA), www.sae.org. SAE J941 Motor Vehicle Drivers Eye Locations SAE J1100 Motor Vehicle Dimensions SAE J1516 Accommodation Tool Reference Point SAE J1517 Driver Selected Seat Position SAE INTERNATIONAL J1052 OCT2017 Page 3 of 16 3. DEFINITIONS The following terms are defined in SAE J941 3.1 Ey
17、ellipse 3.2 Cyclopean (Mid-Eye) Eyellipse The following terms are defined in SAE J1100. 3.3 Accelerator Heel Point, AHP 3.4 AHP Z Coordinate, H8 3.5 Ball of Foot Reference Point, BOFRP 3.6 Ball of Foot Reference Point (BOFRP) to Steering Wheel Center, L6 3.7 BOFRP X Coordinate, L1 3.8 Seat Height, H
18、30 3.9 Seating Reference Point, SgRP 3.10 SgRP Y Coordinate, W20 3.11 H-Point Travel Path, TL23 3.12 Torso Angle, A40 3.13 Steering Wheel Center 4. USING THE HEAD POSITION CONTOURS IN DESIGN The following considerations should be kept in mind when applying head position contours during design. Head
19、position contours are models that describe occupant head locations for a population, not an individual. In this document, the head contours for Class A vehicles are based on a USA population having an equal number of males and females. The original Head position contours were constructed as tangent
20、cutoff tools by applying a mean head profile (SAE Paper 750356) to the appropriate tangent cutoff eyellipse (see Figure 1). This means that a plane drawn tangent to the surface of a 95 percentile head position contour will result in 95% of the head locations lying on one side of the plane, while 5%
21、will be on the other. It does not mean that the 95th percentile head position contour contains 95 percent of occupant head locations inside its surface. The surface of a head position contour represents the surface of the population of heads with hair. If the top of the 95% head contour is just touc
22、hing a vehicle surface, this means that 5% of a population consisting of half males/half females would have their head or hair contacting a vehicle surface when sitting in their preferred seating posture. Designers will need to add additional clearance around the head contours in order to prevent oc
23、cupants head or hair from touching vehicle surfaces and structures in normal driving or riding postures. SAE INTERNATIONAL J1052 OCT2017 Page 4 of 16 5. SELECTING THE CORRECT HEAD POSITION CONTOUR Three factors determine which head contour to use: H-Point Travel Path (TL23), desired accommodation pe
24、rcentile value, and occupant seat location. 5.1 H-Point Travel Path, TL23 The size and location of the head position contour varies depending on the amount of fore/aft H-Point Travel Path, or seat track travel, available. There are three categories of seat track travel: 0 mm (fixed seat), up to 133
25、mm, and greater than 133 mm. Seat track travel also determines the side view angle of the contour. For adjustable seats (track travel greater than 0 mm), the head contour is tipped down in front 12 degrees. Head contours for fixed seats are not tipped. 5.2 Accommodation Percentile Values Head positi
26、on contours for 95th and 99th accommodation percentiles are provided. Percentile value affects the size of the contour, with the 99th percentile contour larger than the 95th. Only the 95th percentile head position contours are required for dimensions given in SAE J1100. 5.3 Occupant Seat Location 5.
27、3.1 Front Row For the driver and front outboard passenger, the head position contours are 23 mm wider in rear view than for other occupants (see 6.3 and A.1.2). The additional 23 mm is located outboard of occupant centerline. There are 6 possible head position contours available for the driver and f
28、ront outboard passenger depending on the amount of seat track travel available and the desired accommodation percentile value. Adjustable seat head position contours are also used for the center occupant in the front row. In this case, the 23 mm segment should not be incorporated into the adjustable
29、 seat head contour. 5.3.2 Second and Succeeding Rows For occupant seat locations behind the front row, only two contours are provided 95th percentile fixed seat and 99th percentile fixed seat. If the 2ndor succeeding row seat has fore/aft H-point adjustment, with a seat back angle that is either fix
30、ed or adjustable, there are no field data available on which to base a procedure for selecting or locating a head contour. Until such data are available, select the 95% or 99% fixed seat head contour, locate it from the manufacturers SgRP and design torso angle, and then sweep the head contour along
31、 the range of normal riding fore/aft seat adjustment. The swept volume defines the range of rider head locations. If the manufacturers SgRP or design torso angle is unknown, use the rearmost, lowest normal riding position and a torso angle of 25 degrees to position the contour. 6. HEAD POSITION CONT
32、OUR GEOMETRY Head position contours are constructed by modifying 3-D ellipsoids. The size of the initial ellipsoid, defined by the length of the X, Y, and Z axes, depends on the desired accommodation percentile value and amount of seat track travel. The centroid of the initial ellipsoid is the point
33、 used for positioning the completed head contour. The size and shape of the completed head contour depends on the desired percentile value, amount of seat track travel, and occupant seat location. 6.1 Construct an Ellipsoid Construct the appropriate ellipsoid using the values in Table 1. Identify th
34、e centroid of the ellipsoid and maintain this point. SAE INTERNATIONAL J1052 OCT2017 Page 5 of 16 Table 1 - Ellipsoid axes dimensions (mm) Percentile Value H-Point Travel Path (TL23) Axis Length from Centroid X Axis Length from Centroid Y Axis Length from Centroid Z 95th 133 mm 211.25 143.75 133.50
35、133 mm 246.04 166.79 151.00 133 mm 211.25 143.75 166.75 + 133.50 133 mm 211.25 143.75 143.75 + 133.50 133 mm 246.04 166.79 189.79 + 151.00 133 mm 246.04 166.79 166.79 + 151.00 133 mm 90.6 0 52.6 or = 133 mm 89.5 0 45.9 0 mm (fixed seat) 96.7 0 44.8 7.2 Locating from Vehicle Grid Alternatively, the h
36、ead position contours may be located directly from vehicle grid without first locating the cyclopean eyellipse centroid. These locating equations are provided in Table 5. SAE INTERNATIONAL J1052 OCT2017 Page 7 of 16 Table 5 - Head contour ellipsoid centroid relative to vehicle grid (mm) H-Point Trav
37、el Path (TL23) Head Ellipsoid Centroid Location Greater than 0 mm X = L1 + 664 + 0.587(L6) 0.176(H30) 12.5t + Xh Eq. 1 Y = W20 Eq. 2 Z = H8 + 638 + H30 + Zh Eq. 3 0 mm (fixed seat) X = L31 + 619 sin + Xh Eq. 4 Y = W20 Eq. 5 Z = H70 + 619 cos + Zh Eq. 6 where = 0.698(A40) 9.09 and Xh and Zh are selec
38、ted from the appropriate row of Table 4, L1 is the BOFRP X coordinate, L6 is the x-distance from steering wheel center to BOFRP, H30 is the Z coordinate of the SgRP, measured vertically from AHP, t is transmission type (1 with clutch pedal, 0 without clutch pedal), W20 is SgRP Y coordinate, H8 is AH
39、P Z coordinate, is the side view fixed seat eyellipse angle in degrees (z-axis tipped back at the top from vertical), and A40 is the design torso angle. Determine t based on the percentage of vehicle production that has a clutch pedal. If 50% or more of anticipated production has a clutch pedal, set
40、 t=1. Otherwise, set t=0. 8. ASSESSING HEAD CLEARANCE Head clearance is established as the closest distance between the head position contour and any protrusion or interior surface. This distance is measured normal (90) to the head position contour (see Figure 4). To accommodate the percentage of oc
41、cupants represented by a given percentile head position contour, there must be some space between that head position contour and the vehicle interior surfaces. Otherwise, some occupants would have their head or hair contacting a vehicle interior surface. Head clearance dimensions defined in SAE J110
42、0 are based on side and rear view sections cut normal to grid through the top of contour the highest point on the SgRP Y-plane of a head position contour (see Figures 2 and 3). SAE INTERNATIONAL J1052 OCT2017 Page 8 of 16 Figure 1 - Development in side view of head position contour by spotting eye r
43、eference of mean head around eyellipse Figure 2 - Head position contours for Class A vehicles with fixed seats SAE INTERNATIONAL J1052 OCT2017 Page 9 of 16 Figure 3 - Driver head position contours for Class A vehicles with seat track travel greater than 133 mm Figure 4 - Minimum head clearance SAE I
44、NTERNATIONAL J1052 OCT2017 Page 10 of 16 9. BIBLIOGRAPHY SAE J1052 MAY87 Motor Vehicle Driver and Passenger Head Position SAE J1052 APR97 Motor Vehicle Driver and Passenger Head Position SAE J1052 AUG02 Motor Vehicle Driver and Passenger Head Position SAE Paper 650464 J.F. Meldrum (1965), “Automobil
45、e Driver Eye Position,” SAE Mid-Year Meeting, Chicago, IL SAE Paper 720200 D.C. Hammond and R.W. Roe (1972), “Driver Head and Eye Positions,” SAE Annual Congress, Detroit, MI SAE Paper 750356 R.W. Roe (1975), “Describing the Drivers Workspace: Eye, Head, Knee, and Seat Positions,” SAE Annual Congres
46、s, Detroit, MI SAE Paper 852317 (in SAE Special Pub. 712)N.L. Philippart and T.J. Keuchenmeister (1985), “Describing the Truck Driver Workspace”, SAE Truck & Bus Meeting, Chicago, IL Lee, N.S. and Schneider, L.W. “A Preliminary Investigation of Driver Lean in Late Model Vehicles with Bench and Bucke
47、t Seats,” UMTRI Report No. UMTRI-88-49, November 1988 (Available from UMTRI, 2901 Baxter Road, Ann Arbor, MI 48109-2150, Tel: 734-764-6504, www.umtri.umich.edu) CAESAR (Civilian American and European Surface Anthropometry Resource) Final Report, November 2002 (Available from SAE at http:/store.sae.o
48、rg/caesar) 10. NOTES 10.1 Revision Indcator A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indica
49、tes a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE HUMAN ACCOMMODATION AND DESIGN DEVICES STANDARDS COMMITTEE SAE INTERNATIONAL J1052 OCT2017 Page 11 of 16 APPENDIX A - DEVELOPMENT OF HEAD POSITION CONTOURS A.1 PRIOR SAE J1052 HISTORICAL
