System for testing automotive safety belts

The basis of the system is an industrial PC collecting data from 3 acceleration sensors mounted on a manikin moving on a trolley braked in a defined stopping path simulating a vehicle impact. At the same time, the deceleration of the trolley is measured using an optical sensor and a comb with notches of defined length. The carriage speed is thus converted to a pulse length measurement as the carriage moves. Another measured value is the maximum inclination of the manikin during the braking distance of the trolley – a static quantity measured after impact. The system software is based on the standard EfLab program with custom modifications.

Properties:

• dynamic measurement of analog signals,
• dynamic pulse length measurement – trolley deceleration,
• combination of dynamic and static measurement.

Measured units:

(stated accuracy of measurement is over the whole measuring chain, including sensors)

Unit	No. of channels	Resolution	Accuracy	Sampling
acceleration (x, y, z)	3	0.01%	0,5%	10 kHz
displacement of the manikin	1	1 mm	0,5%
starting speed	1	0.25 km/h	0,5%
trolley deceleration	1	0.000 1  ms	0,5%

More information request here.