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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
3.8 Infant Restraint Systems with a Separate Base
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 D
American Society for Testing and Materials:
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)
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/20071219024956im_/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 A Type 1 seat belt assembly that meets 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 unclothed anthropomorphic test device
(ATD) that represents a six-month-old infant and conforms to the requirements
of the U.S. Code of Federal Regulations (October 1, 1996), Title
49, Part 572, Subpart D, 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.
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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 infant 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 infant 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
4 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 infant restraint system at the centre seating position of the
standard seat assembly. 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 Position the ATD specified in subsection 2.4
in accordance with the manufacturer's instructions and as follows:
(a) With the ATD supine on a horizontal surface, and with a hand
placed on its torso to prevent it from moving, lift the feet of the
ATD until the legs touch the upper torso and the feet touch the head
or as far as they will go. Slowly release the legs, allowing them
to come to rest of their own accord. Do not return them to the flat
surface.
(b) Place the ATD in the infant restraint system so that its back
is in contact with the seat back of the system. Attach the belts and
harnesses of the system around the ATD.
(c) Tighten 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, if applicable, 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.
(d) Extend the ATD's arms upward horizontally and rotate them downward
until they are in contact with a surface of the infant restraint system
or the standard seat assembly. The movement of the arms must not be
restricted in any but the downward direction.
3.4.3 In accordance with the manufacturer's instructions, attach
the infant restraint system, if it is not already installed, to the
standard seat assembly using the motor vehicle seat belt; attach the
tether strap, if one has been provided; and 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 angle of the seat back and determine the conformance
of the infant restraint system to the requirements of section
10 of Schedule 4 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 Place a new infant restraint system at the centre seating
position of the standard seat assembly in accordance with the manufacturer's
instructions.
3.6.2 Place the ATD specified in subsection 2.4
in the infant restraint system and position it in accordance with the
manufacturer's instructions and as follows:
(a) With the ATD supine on a horizontal surface, and with a hand
placed on its torso to prevent it from moving, lift the feet of the
ATD until the legs touch the upper torso and the feet touch the head
or as far as they will go. Slowly release the legs, allowing them
to come to rest of their own accord. Do not return them to the flat
surface.
(b) Place the ATD in the infant restraint system so that its back
is in contact with the seat back of the system. Attach the belts and
harnesses of the system around the ATD.
(c) Tighten 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, if applicable, 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.
(d) Extend the ATD's arms upward horizontally and rotate them downward
until they are in contact with a surface of the infant restraint system
or the standard seat assembly. The movement of the arms must not be
restricted in any but the downward direction.
3.6.3 Attach the lower connectors of the restraint system to
the lower universal anchorage system and the tether strap, if one has
been provided, to the standard seat assembly in the following manner:
(a) Adjust rigid lower connectors in accordance with the manufacturer's
instructions;
(b) If a tether strap has been provided, tighten it 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 angle of the seat back and determine the conformance
of the infant restraint system to the requirements of subsection
13(1.1) of Schedule 4 to the RSSRs.
3.8 Infant Restraint Systems with
a Separate Base
In the case of a system that has a separate, removable base, the seating
component of which may be used without the base,
(a) Where lower connectors are supplied on the base only, the tests
described in subsections 3.4 and 3.5
are to be conducted for the seating component and the tests described
in subsections 3.4 to 3.7 are to be conducted for the base;
(b) Where lower connectors are supplied on both the base and the
seating component, the tests described in subsections 3.4 to 3.7 are
to be conducted for both the base and the seating component.
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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 the system
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 90 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
4 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
4 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
4 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
5 of Schedule 4 to the RSSRs.
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6.
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Inversion Test Procedure
6.1 Each infant 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 infant 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 infant restraint system.
6.5 The combination of representative aircraft passenger seat,
infant 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, infant 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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