Acceleration Type Sled and Deceleration type Sled JASIC Japan GRSP Inf Group on Child Restraint Systems CRS3108 April 11th 2012 Informal document GRSP5138 51st GRSP 21 25 May 2012 ID: 257104
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Slide1
Comparison of CRS Side Impact Test Results Using by Acceleration Type Sled and Deceleration type Sled
JASIC / Japan
GRSP Inf. Group on Child Restraint SystemsCRS-31-08
April 11th , 2012
Informal document
GRSP-51-38
(51st GRSP, 21 – 25 May 2012,
agenda item
20)Slide2
Background & Purpose
NTSEL (type approval test department in Japan) has the acceleration type sled test system. So it is necessary to compare the CRS side impact sled test results between tested by deceleration type sled system and tested by acceleration type sled test system.We done CRS side impact sled tests by acceleration type sled test system and confirm to compare the test severity between deceleration sled and acceleration sled.Slide3
Concept of CRS Side Impact Test Using by Acceleration Type Sled SystemSlide4
Parameters of New Side Impact Test
Relative velocity between door and sled
Door intrusionSlide5
Photos before sled testsSlide6
VideoSlide7
Test Concept
In this test concept, door moved with sled and seat moved on sled on sled.
Relative velocity
IntrusionSlide8
Comparison of Test Results Using by Acceleration Type Sled System and Deceleration Type Sled SystemSlide9
Tested CRS
CRS ACRS BCRS A is Group I TT CRS and CRS B is Group I SL CRSSlide10
Maximum injury Measures (CRS A) Date from TUB and DorelSlide11
Maximum Injury Measures (CRS A) As for the head injury measures, the test results were almost similar
Date from TUB and DorelSlide12
Video of Side Impact Test (CRS A)
Deceleration SledAcceleration Sled
Date from DorelSlide13
Relative velocityTime Histories (CRS A)
Date from DorelSlide14
Head accelerationTime Histories (CRS A)
As for the head acceleration, time histories were almost similar
Date from DorelSlide15
Chest accelerationTime Histories (CRS A)
Pelvis accelerationNeck Upper ForceNeck Upper Moment
Date from DorelSlide16
Head acceleration (Dorel data moves 5ms)Time Histories (CRS A)
As for the head acceleration, time histories were almost similar
Date from DorelSlide17
Chest accelerationTime Histories (CRS A)
Pelvis accelerationNeck Upper ForceNeck Upper MomentDorel data moves 5ms
Date from DorelSlide18
Maximum Injury Measures (CRS B) Date from Dorel
Date from DorelSlide19
Maximum Injury Measures (CRS B)
As for the head injury measures, the test results were almost similarDate from DorelSlide20
Video of Side Impact Test (CRS B)Deceleration Sled
Acceleration Sled
Date from DorelSlide21
Relative velocity
Time Histories (CRS B) Date from DorelSlide22
Head accelerationTime Histories (CRS B)
As for the head acceleration, time histories were almost similar
Date from DorelSlide23
Chest accelerationTime Histories (CRS B)
Pelvis accelerationNeck Upper ForceNeck Upper Moment
0
10
20
30
40
50
60
70
80
0
10
20
30
40
50
60
70
80
Time (ms)
Acceleration (G)
NTSEL
Dorel
0
10
20
30
40
50
60
70
80
90
100
110
0
10
20
30
40
50
60
70
80
Time (ms)
Acceleration (G)
NTSEL
Dorel
0
100
200
300
400
500
600
700
800
900
1000
0
10
20
30
40
50
60
70
80
Time (ms)
Force
(
N
)
NTSEL
Dorel
-6
-4
-2
0
2
4
6
8
10
12
14
0
10
20
30
40
50
60
70
80
Time (ms)
Moment
(
N
m
)
NTSEL
Dorel
Date from DorelSlide24
Conclusion
As for the head injury measures, the results used by acceleration sled and deceleration sled were almost similar.Comparison of Dorel data and NTSEL data, time histories were almost similar. Severity of the CRS side impact test used by deceleration sled and acceleration sled are similar.