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How the Driver Reaction Meter Works

The SIBTEC Driver Reaction Meter allows an assessor to quantify accurately a driver's ability to operate the controls of any car.

The meter can be used in cars with or without special controls and it can be used to determine whether any special driving controls are needed.

The SIBTEC Driver Reaction Meter is easily fitted to the windscreen by means of a suction cup. Movement in the brake and accelerator pedals is sensed using two retractable chains; and the torque applied to the steering wheel can be measured by locking the steering wheel, using a force measurement bar.

During the set-up process, the same force measurement bar is used to calibrate the brake pedal, which means that, during a test, the amount of movement in the brake pedal is comparable to the amount of force applied.


Digital Output

The unit can be used in conjunction with most modern computers. The software supplied is easy to use and will guide the operator through setting up the equipment, and carrying out both the braking reaction test and the steering torque test. All data is instantly presented in easily interpreted graphs, and the critical points on each graph are automatically annotated. Tests sessions are saved in *.xml format so data can easily be retrieved by databases.


The Braking Reaction Test

Measures cognitive and physical breaking reaction from visual and aural stimuli and measures the maximum force applied to the brake pedal. The stimuli to start the test are given at a random interval from full depression of the accelerator.

An average graph is produced for an unlimited number of readings. (Accuracy = 0.01sec, +/- 5N).

The measuring equipment does not interfere with the natural movement of the pedals.
Annotated figures:
Bt1= cognitive reaction time
Bt2= time to begin first positive brake pedal movement
Bt3= time to reach highest braking system band
Maximum force achieved= The force required to move the brake pedal to the furthest point achieved by the driver.


The Steering Torque Test

Measure ability to sustain a torque applied to the steering wheel over fifteen seconds, in both directions.

Average graph produced for an unlimited number of readings.

Annotated figures:
St1= time to reach highest torque achieved
St2= 10 seconds after St1
Min Torque= the lowest torque to which the client dropped after the highest torque at St1


Average graphs

Average graphs for both the braking reaction tests and the steering torque tests are produced. The annotated figures are mean averages of all the relative figures recorded, and all the graphs are superimposed on top of each other, conveniently highlighting any anomalous readings, and the overall spread of driver ability.


Specifications

RS 232 Serial Port (USB converters can be supplied)
Powered by 4 x AA batteries
Net weight (kg): 2.9
Carry case dim. (mm): 500x400x220

SIBTEC SCIENTIFIC,
Sibert Technology Limited, 2a Merrow Business Centre, Guildford, Surrey,
GU4 7WA, England,
Tel: +44 1483 440724, Fax: +44 1483 440727;
Email:NDT@sibtec.com.
Copyright © 2004, Sibtec Scientific
Revised -- June 2004
Sibtec Scientific is a trade name of Sibert Technology Ltd.