Seatbelt force sensors are critical measurement devices in automotive crash testing. Calibration quality directly affects test data accuracy. This article covers:
I. Pre-Calibration Preparation
Check sensor physical integrity, confirm cable connection reliability, and allow warm-up time of at least 30 minutes.
II. Standard Operating Procedure
- Zero-point calibration: Ensure zero output under no-load condition
- Multi-point loading: Load progressively at 20%, 40%, 60%, 80%, 100% of rated load
- Data recording: Record readings after stabilization at each point
- Linearity analysis: Calculate whether non-linearity error is within tolerance
III. Frequently Asked Questions
Q: What about calibration curve drift?
A: First check temperature stability; recommend calibrating in temperature-controlled environment.
Q: When should a sensor be replaced?
A: Consider replacement when repeatability error exceeds ±1%FS or sensitivity drops more than 3%.