Seat belt locking device test

Case study

Seat belt mechanism test close up on site

Seat belt mechanism test and current AFG gauge

Solution

Digital force gauge
Integrated bespoke fixturing designed to accomodate the instrument

Benefits

Quick and reliable custom testing to internal standards
Confidence in meeting industry safety objectives

Requirement

The customer requested a system to measure the force required to release the locking mechanism of a car seat-belt whilst it is under tension. The test is carried out to ensure the seat-belt can be released easily by a passenger after an accident.

The force measuring instruments must be versatile and easy to fit into a customised test rig designed by the customer.

Solution

Two separate force gauges were supplied for integration into a mechanical test rig. The 1000 N Micro-processor Force Gauge was connected to a motor drive assembly which served to pre-tension the seat-belt to a specified limit. A lever-mechanism was attached to the 250N force gauge and used to measure the compression force required to activate the locking device. The peak force was then recorded on the display and noted by the operator.