Overview
ISO/TS 29062:2009 - "Road vehicles - Child restraint systems - Sled test method to enable the evaluation of side impact protection" - is an ISO Technical Specification that defines a sled‑test procedure to evaluate how child restraint systems (CRS) perform in lateral (side) impacts. The method reproduces the two key injury mechanisms seen in struck‑side collisions: rapid vehicle deceleration and intruding side structure. It uses a single sled with a hinged panel to simulate the intruding inner door/side structure and independently reproduces sled acceleration to represent vehicle body motion.
Key topics and technical requirements
- Test purpose: Simulate struck‑side impact conditions where most serious child injuries occur and measure CRS effectiveness.
- Test concept: Single sled reproducing body acceleration plus a pivoted (hinged) intruding panel representing the inner side structure.
- Boundary conditions / target ranges:
- Intrusion velocity: 7–10 m/s
- Intrusion depth: ≈ 250 mm
- Sled deceleration: 10 g – 15 g
- Door panel height (relative): ≈ 500 mm
- Lateral distance from panel to CRS centre line at start: ≈ 300 mm
- Velocity change (Δv) corridor: 25 km/h ± 1 km/h
- Test rig & equipment: sled + test bench, hinged panel with 55 mm padding, seat belt and ISOFIX anchorages, top tether and seat bight anchorages. ISOFIX attachments and (for some setups) the backrest are allowed to move in Y direction (up to 200 mm) to avoid excessive loading on attachments.
- Instrumentation & measurements: comply with ISO 6487 and ISO 8721. Measured parameters include sled acceleration/Δv, panel angular velocity, head and chest tri‑axial accelerations, neck forces/moments, optional chest compression, and head displacement (video).
- Installation & test dummies: New untested CRS only. Installation per Annex A (belted) or ISO 13216‑1 / ECE R44 (ISOFIX). Dummy selection is left to state‑of‑the‑art recommendations.
Applications and users
ISO/TS 29062:2009 is intended for:
- CRS manufacturers developing side‑impact optimized child seats, boosters and harness systems.
- Crash test laboratories implementing sled tests to quantify side protection performance.
- Vehicle OEMs evaluating seating and interior geometry effects on child protection.
- Regulatory bodies and safety researchers seeking a reproducible method that complements full‑vehicle side impact tests (e.g., ECE R95).
Practical uses include R&D validation of side padding, ISOFIX designs, belt routing and head containment strategies under simulated intrusion loading.
Related standards
- ISO/TR 14646 (background data & method development)
- ISO 6487 (instrumentation for impact tests)
- ISO 8721 (optical instrumentation)
- ISO 13216‑1 (ISOFIX anchorages)
- ECE Regulation No. 44 and ECE Regulation No. 95 (child restraints and side impact context)
Keywords: ISO/TS 29062:2009, child restraint systems, sled test method, side impact, hinged panel, intrusion velocity, ISOFIX, vehicle safety, crash testing.