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Revised: October 2001
Issued: April 1, 1982
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TABLE OF CONTENTS
3.1 Test Acceleration
3.2 Test Conditions
3.3 Pre-Test Buckle Release Force Measurement
3.4 Positioning of the ATD and Installation of the Restraint
System for the Dynamic Test Using the Seat Belt Assembly
3.5 Test Procedure
3.6 Positioning of the ATD and Installation of the Restraint
System for the Dynamic Test Using the Lower Universal Anchorage System
3.7 Test Procedure
TABLE OF FIGURES
LIST OF REFERENCED DOCUMENTS
Drawing Package NHTSA SAS-100-1000
Society of Automotive Engineers Recommended Practice J211, Instrumentation
for Impact Tests (October 1988)
U.S. Code of Federal Regulations (October 1, 1996), Title 49,
Part 572, Subpart C
American Society for Testing and Materials:
Standard Specification for Flexible Cellular MaterialsSponge
or Expanded Rubber, Designation No. D 1056-1
Standard Specification for Flexible Cellular MaterialsVinyl
Chloride Polymers and Copolymers (Open-Cell Foam), Designation No.
D 1565-81 (Reapproved 1990)
Standard Test Methods for Flexible Cellular MaterialsSlab, Bonded,
and Molded Urethane Foams, Designation No. D 3574-95
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2.
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Test Devices to be Used for the Dynamic Test
and the Buckle Release Test
2.1 The seat to be used for the dynamic test prescribed in this
test method is the standard seat assembly, as described in Drawing Package
NHTSA SAS-100-1000 and shown in Figure 1(a),
which indicates the location of the seat belt anchorage points, and Figure
1(b), which indicates the location of the lower universal anchorage
system, mounted on a dynamic test platform so that the Seat Orientation
Reference Line (SORL) is parallel to the direction of travel of the test
platform and so that movement between the base of the assembly and the
platform is prevented.
2.1.1 In this test method,"Representative
Aircraft Passenger Seat" means, either a production aircraft passenger
seat that has been approved by the U.S. Federal Aviation Administration
or by Transport Canada's Director, Aircraft Certification, or a simulated
aircraft passenger seat that conforms to the requirements of Figure
5.
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![Figure 1(a) — Three-dimensional Schematic View and Side View of the Standard Seat](/web/20071219023204im_/http://www.tc.gc.ca/roadsafety/mvstm_tsd/images/213,2131,2133,2135_Fig_Location_Seat_Belt_Anchorage_Points_Eng.gif)
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Notes:
1. Dimensions are in mm, except where otherwise indicated.
2. Drawings are not to scale.
3. Lap belt anchorage points are symmetrically located with respect to
the centre SORL.
4. Maximum distance from the seat bight to the end of the buckle is 175
mm.
5. Outboard anchorage point is located 700 mm from the centre SORL.
6. Anchorage point on the rear package shelf is located on the vertical
longitudinal plane containing the centre SORL.
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Figure 1(a) Three-dimensional Schematic View and
Side View of the Standard Seat Assembly Indicating the Location of the Seat
Belt Anchorage Points
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Notes:
1. Dimensions are in mm, except where otherwise indicated.
2. Drawings are not to scale.
3. Lower universal anchorage system bars are 6 mm in diameter and 25 mm
in length.
4. Transverse horizontal distance between the centre of the bars and the
vertical plane containing the SORL at the centre of the seat assembly
is 140 mm.
5. Anchorage point on the rear package shelf is located on the vertical
longitudinal plane containing the centre SORL.
6. Head excursion limit is 720 mm.
7. Lower universal anchorage system bars are located 102 mm forward of
Z Point and 323 mm above the floor.
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Figure 1(b) Three-dimensional Schematic View and
Side View of the Standard Seat Assembly Indicating the Location of the Lower
Universal Anchorage System
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2.2 The test platform must be instrumented with an
accelerometer that is linked to a data processing system, and the accelerometer-sensitive
axis must be parallel to the direction of travel of the test platform. The
data must be filtered with a Class 60 filter, as specified in the Society
of Automotive Engineers Recommended Practice (SAE) J211, Instrumentation
for Impact Tests (October 1988).
2.3 Type 1 or Type 2 seat belt assemblies that meet the requirements
of
section 209 of the Motor Vehicle Safety Regulations and whose
webbing is not more than 50 mm wide must be attached, without the use
of retractors or reels of any kind, to the seat belt anchorage points
provided on the standard seat assembly.
2.4 An anthropomorphic test device (ATD) that
represents a three-year-old child and conforms to the requirements of
the U.S. Code of Federal Regulations (October 1, 1996), Title 49,
Part 572, Subpart C, is to be used in the dynamic test and the buckle
release test. The ATD must have a target point on each side of the head
that is 75 mm from the top surface and 65 mm from the front surface, and
it must be clothed in:
(a) thermal knit, waffle-weave polyester and cotton underwear,
(b) a size-4 long-sleeved shirt having a mass of 0.1 kg,
(c) a size-4 pair of long pants having a mass of 0.1 kg and cut off
just far enough above the knee to allow the knee target point to be
visible, and
(d) size-7M sneakers with rubber toe caps, uppers of dacron and cotton
or nylon having a total mass of 0.45 kg.
2.4.1 The clothing of the ATD, other than the shoes, must be machine
washed in water that is 70°C to 82°C and machine dried at 48°C
to 60°C for 30 minutes.
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3.
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Dynamic Tests
A first dynamic test is to be conducted in accordance with the procedure
set out in subsections 3.4 and 3.5
using a new child restraint system that is attached to the standard seat
assembly as shown in Figure 1(a) by the
seat belt assembly and a tether strap, if one is provided with the system.
A second dynamic test is to be conducted in accordance with the procedure
set out in subsections 3.6 and 3.7
using a new child restraint system that is attached to the standard seat
assembly as shown in Figure 1(b) by the
lower universal anchorage system and a tether strap, if one is provided
with the system.
3.1 Test Acceleration
The dynamic tests simulate a frontal impact at 48 km/hr. At all points
in time until 48 milliseconds after the start of the pulse, the acceleration
of the test platform must be above that indicated by the line shown in
Figure 2 and such that the total change of
velocity is at least 48 km/h.
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Figure 2 Test Platform Acceleration Graph
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3.2 Test Conditions
For the dynamic tests, the ambient temperature must be from 19°C
to 26°C and the relative humidity from 10% to 70%.
3.3 Pre-Test Buckle Release Force
Measurement
If the belts of the restraint system are equipped with buckles, the
release force of each buckle is to be measured in the following manner
before commencing the dynamic tests.
3.3.1 Place the buckle assembly on a hard, level surface.
3.3.2 Apply a pullout force of 9 N to the
buckle assembly in a direction that will produce maximum releasing effect,
in the case of
(a) A push-button-actuated buckle, at least 3.2 mm from the edge
of the push-button access opening of the buckle, or
(b) A lever-actuated buckle, on the centreline of the buckle lever
or finger tab.
3.3.3 Measure the force required to release
the buckle and determine its conformance to the requirements of Schedule
3 to the RSSRs.
3.4 Positioning of the ATD and Installation
of the Restraint System for the Dynamic Test Using the Seat Belt Assembly
3.4.1 In accordance with the manufacturer's instructions, place
a new child restraint system at the centre seating position of the standard
seat assembly and position each movable surface. If the restraint system
is installed by passing the motor vehicle seat belt over the system
and under the seated ATD, attach the seat belt to the restraint system,
but do not tighten it.
3.4.2 Place the ATD specified in subsection 2.4
in the child restraint system and position it according to the manufacturer's
instructions and as follows:
(a) Holding the torso upright until it contacts the seat back of
the system, seat the ATD in the child restraint system so that the
mid-sagittal plane of its head is coincident with the SORL of the
standard seating assembly.
(b) Lift the arms of the ATD as far upward as possible. Extend the
legs of the ATD as far forward horizontally as possible, with its
feet perpendicular to the centreline of the lower legs.
(c) Using a flat square surface with an area of 2 580 mm², apply
a force of 180 N perpendicular to the plane of the back of the standard
seat assembly, first against the crotch of the ATD and then against
the mid-sagittal plane of its thorax.
(d) Attach all the appropriate belts and harnesses on the child restraint
system and tighten them as specified in subsection 3.4.3.
(e) Rotate each limb of the ATD downward in a plane parallel to its
mid-sagittal plane until the limb touches a surface of the child restraint
system or the standard seat assembly. Position the limbs so that they
will not inhibit the movement of the torso or head during the test,
and
(i) In the case of a rearward-facing child restraint system for
children whose mass is 16 kg or less, if the lower limbs of the
ATD contact the seat back of the standard seat assembly, remove
the lower limbs at the knees;
(ii) In the case of a rearward-facing child restraint system for
children whose mass is 22 kg or less, if the lower limbs of the
ATD contact the seat back of the standard seat assembly, remove
the lower limbs at the knees and secure each limb on either side
of the upper legs of the ATD.
3.4.3 If shoulder and pelvic belts are provided
that directly restrain the ATD, they must be adjusted by tightening
the belts until a 9-N force applied using a webbing tension pull device
(as illustrated in Figure 3) to the webbing
at the top of each shoulder and to the pelvic webbing 50 mm on either
side of the mid-sagittal plane of the torso pulls the webbing a distance
of 7 mm away from the ATD.
3.4.4 In accordance with the manufacturer's instructions, attach
the child restraint system, if it is not already installed, to the standard
seat assembly using the motor vehicle seat belt and attach the tether
strap, if one has been provided. Tighten the seat belt and tether strap
to a tension, as measured by a force gauge used on the webbing, of
(a) until August 31, 2002, not less than 31 N and not more than 49
N or, at the option of the manufacturer, not less than 53.5 N and
not more that 67 N; and
(b) on or after September 1, 2002, not less than 53.5 N and not more
than 67 N.
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Figure 3 Webbing Tension Pull Device
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3.5 Test Procedure
3.5.1 Accelerate the test platform in accordance with the requirements
of subsection 3.1.
3.5.2 Measure the excursion of the ATD and determine the conformance
of the child restraint system to the requirements of section
13 of Schedule 3 to the RSSRs.
3.6 Positioning of the ATD and Installation
of the Restraint System for the Dynamic Test Using the Lower Universal
Anchorage System
3.6.1 In accordance with the manufacturer's instructions, place
a new child restraint system at the centre seating position of the standard
seat assembly and position each movable surface. As specified in subsection
3.6.4 and in accordance with the manufacturer's
instructions, attach the lower connectors of a forward-facing child
restraint system to the lower universal anchorage system and attach
the tether strap, if one has been provided, to the standard seat assembly,
but do not tighten it.
3.6.2 Place the ATD specified in subsection 2.4
in the child restraint system and position it according to the manufacturer's
instructions and as follows:
(a) Holding the torso upright until it contacts the seat back of
the system, seat the ATD in the child restraint system so that the
mid-sagittal plane of its head is coincident with the SORL of the
standard seating assembly.
(b) Lift the arms of the ATD as far upward as possible. Extend the
legs of the ATD as far forward horizontally as possible, with its
feet perpendicular to the centreline of the lower legs.
(c) Using a flat square surface with an area of 2 580 mm², apply
a force of 180 N perpendicular to the plane of the back of the standard
seat assembly, first against the crotch of the ATD and then against
the mid-sagittal plane of its thorax.
(d) Attach all the appropriate belts and harnesses on the child restraint
system and tighten them as specified in subsection 3.6.3.
(e) Rotate each limb of the ATD downward in a plane parallel to its
mid-sagittal plane until the limb touches a surface of the child restraint
system or the standard seat assembly. Position the limbs so that they
will not inhibit the movement of the torso or head during the test,
and
(i) In the case of a rearward-facing child restraint system for
children whose mass is 16 kg or less, if the lower limbs of the
ATD contact the seat back of the standard seat assembly, remove
the lower limbs at the knees;
(ii) In the case of a rearward-facing child restraint system for
children whose mass is 22 kg or less, if the lower limbs of the
ATD contact the seat back of the standard seat assembly, remove
the lower limbs at the knees and secure each limb on either side
of the upper legs of the ATD.
3.6.3 If shoulder and pelvic belts are provided
that directly restrain the ATD, they must be adjusted by tightening
the belts until a 9-N force applied using a webbing tension pull device
(as illustrated in Figure 3) to the webbing
at the top of each shoulder and to the pelvic webbing 50 mm on either
side of the mid-sagittal plane of the torso pulls the webbing a distance
of 7 mm away from the ATD.
3.6.4 Attach the lower connectors of a rearward-facing
restraint system to the lower universal anchorage system and attach
the tether strap, if one has been provided, to the standard seat assembly
in accordance with the manufacturer's instructions and in the following
manner:
(a) Adjust rigid lower connectors in accordance with the manufacturer's
instructions;
(b) Tighten the tether strap of both forward- and rearward-facing
restraint systems to a tension of not less than 53.5 N and not more
than 67 N, as measured by a force gauge used on the webbing.
3.7 Test Procedure
3.7.1 Accelerate the test platform in accordance with the requirements
of subsection 3.1.
3.7.2 Measure the excursion of the ATD and determine the conformance
of the child restraint system to the requirements of subsection 13(1.1)
of Schedule 3 to the RSSRs.
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4.
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Buckle Release Test Procedure
4.1 The release force of each buckle
is to be tested with the ATD specified in subsection 2.4
of this test method retained in the restraint system and both forward-
and rearward-facing child restraint systems installed in a forward-facing
direction.
4.2 The buckle release force is to be tested as follows:
(a) Tie a self-adjusting sling to the wrists and ankles of the ATD,
as illustrated in Figure 4.
(b) While applying a pullout force of 9 N to the buckle assembly
in a direction that will produce maximum releasing effect, pull the
sling horizontally and parallel to the SORL of the standard seat assembly
with a force of 200 N.
Note: If the restraint system is equipped with a T-shield, a force
equivalent to its mass must be added to the pullout force. Any shield,
if present, may be adjusted to facilitate application of the pullout
force, provided that the harness tension is not significantly affected.
(c) In order to determine the buckle's conformance to the requirements
of Schedule
3 to the RSSRs, apply the specified force in a direction that will
produce maximum releasing effect, in the case of
(i) A push-button-actuated buckle, at least 3.2 mm from the edge
of the push-button access opening, or
(ii) A lever-actuated buckle, on the centreline of the buckle lever
or finger tab.
(d) If the force required to release the buckle exceeds the requirements
of Schedule
3 to the RSSRs, release the harness tension and apply a force of
22 to 44 N to the lowest accessible part of the tongue 2 to 4 times
in each of four directions at 90-degree angles to each other.
(e) Repeat paragraphs (b) and (c) above while applying a pullout
force on the buckle assembly of 22 N, re-orienting the direction of
the sling pull force if necessary so that the arms of the ATD do not
load the shield.
(f) If the buckle does not release at the force specified in Schedule
3 to the RSSRs, repeat paragraphs (b) and (c) once again using a
pullout force of 44 N.
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Figure 4 Self-Adjusting Sling for the Buckle Release Test
5.
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Energy Absorbing Material Test Procedure
5.1 Prepare and test specimens of energy absorbing material
in accordance with the applicable 25% compression-deflection test described
in one of the following American Society for Testing and Materials (ASTM)
Standards:
- Standard Specification for Flexible Cellular MaterialsSponge
or Expanded Rubber, Designation No. D 1056-91;
- Standard Specification for Flexible Cellular MaterialsVinyl
Chloride Polymers and Copolymers (Open-Cell Foam), Designation
No. D 1565-81 (Reapproved 1990); or
- Standard Test Methods for Flexible Cellular MaterialsSlab,
Bonded, and Molded Urethane Foams, Designation No. D 3574-95.
5.2 Determine the conformance of the test specimens to the requirements
of section
6 of Schedule 3 to the RSSRs.
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6.
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Inversion Test Procedure
6.1 Each child restraint system must meet and be tested in accordance
with the requirements of subsections 6.2 through 6.6 of this test method
when adjusted in any position. The manufacturer may use any seat that
is a representative aircraft passenger seat within the meaning of subsection
2.1.1.
6.2 A representative aircraft passenger seat
must be positioned and adjusted so that its horizontal and vertical
orientation and its seat back angle are the same as those shown in Figure
5.
6.3 The child restraint system must be attached in accordance
with the instructions of the manufacturer of the restraint system to
the representative aircraft passenger seat using, at the manufacturer's
option, any aircraft safety belt approved by the U.S. Federal Aviation
Administration or by Transport Canada's Director, Aircraft Certification.
No supplementary anchorage belts or tether straps may be attached; however,
safety belt extensions approved by the U.S. Federal Aviation Administration
or by Transport Canada's Director, Aircraft Certification, may be used.
6.4 In accordance with the requirements of
subsection 3.3.2, place and restrain the ATD specified
in subsection 2.4 in the child restraint system.
6.5 The combination of representative aircraft passenger seat,
child restraint system, and ATD must be rotated forward around a horizontal
axis that is contained in the median transverse vertical plane of the
seating surface portion of the aircraft seat and is located 25 mm below
the bottom of the seat frame, at a speed of 35° to 45° per second,
to an angle of 180°. The rotation must be stopped when it reaches
that angle, and the seat must be held in this position for three seconds.
The specified rate of rotation must be attained in not less than one-half
second and not more than one second, and the rotating combination must
be brought to a stop in not less than one-half second and not more than
one second.
6.6 Repeat the procedure set forth in subsections
6.2 through 6.4. The combination of the representative aircraft passenger
seat, child restraint system, and ATD must be rotated sideways around
a horizontal axis that is contained in the median longitudinal vertical
plane of the seating surface portion of the aircraft seat and is located
25 mm below the bottom of the seat frame, at a speed of 35° to 45°
degrees per second, to an angle of 180°. The rotation must be stopped
when it reaches that angle, and the seat must be held in this position
for three seconds. The specified rate of rotation must be attained in
not less than one-half second and not more than one second, and the
rotating combination must be brought to a stop in not less than one-half
second and not more than one second.
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Figure 5 Simulated Aircraft Passenger Seat
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