In its laboratories, the I-FAS is applying several systems in order to observe physiological characteristics. These are mainly different eye tracking systems, which are able to measure the driver's line of vision, the size of the lenses or the movement of the eyelids. This way, information about the driver's exhaustion can be obtained. Another part of our I-FAS laboratory equipment are the so called occlusion goggles.
Binaurales Headset: Head Acoustics
The binaural headset (BHS) by Head Acoustics is a system for mutual recording and replay of sounds. The headphone is equipped with two additional microphones close-by the ears, which makes it possible to investigate authentic acoustic signals completely detached from their original environment. This as well as the small size and the easy handling allow the alternate use within laboratory and vehicle. By means of the headset, we can for instance examine the use of warning signals within a vehicle. The BHS is connected to a mobile unit of recording and playback and can work several hours at a time. By means of a modern evaluation software, the data can be analyzed in our Usability Laboratory.
Technical details:
Different sample rates are possible
Input sensitivity adjustable in steps of 10dB between 94dB and 124dB
Automatic equalization through SQuadriga
Headset equipped with wind deflector
Eye tracker: ASL Mobile Eye
ASL Mobile Eye is a very flexible, head-mounted eye tracking system especially applicable for mobile use. Two cameras attached to the glasses record eye movements as well as the surrounding scene in order to discover the proband’s line of vision. The measurement principle applied is pupil-corneal reflection. On an affiliated video recorder, all data are collected and can later be evaluated by means of a special software. The system can be applied in laboratories or driving simulators as well as in a vehicle and is very robust against environmental conditions.
Technical details:
Sampling and output rate 30Hz
System accuracy 0.5 degree visual angle
Resolution: 0.10 degree visual angle
Visual range 50 degrees horizontally and 40 degrees vertically
Eye tracker: faceLAB 4
The faceLAB 4 is a contactless, non-invasive, and video-based eye tracking system measuring the facial features. It is applied mainly within vehicles and is responsible for the detection of the driving behavior as well as cognitive stress, distraction or exhaustion of the driver.
Technical details:
Input is obtained using a stereo camera pair
Binocular, head tracking based eye tracking
Full 3D - 6 degrees of freedom (DOF) head tracking, 2 DOF gaze tracking
Operating distance subject - camera 0.5 - 1.1 meters
Eye tracker: SMI IVIEW X HED
The SMI IVIEW X HED is a non-invasive, video-based eye tracking module. It is applicable for interior or exterior use and allows a great mobility of the test person. Measurement data are thereby obtained by means of the video recording of a scene, which can then be combined with other data like gaze indication or a time stamp.
Technical details:
Monocular
Sampling rate eye movements 50 Hz
Tracking resolution < 0.1 ° (typ.)
Gaze position accuracy < 0.5 ° - 1 ° (typ.)
Eye tracker: SMI IVIEW X RED P/T
The IVIEW X RED P/T is non-invasive, video-based and works completely contactless. It is mainly applied to quickly detect eye movements. A special advantage of this system is for instance the integration of a graphic user interface. All relevant information are thereby presented on a single screen. The IVIEW X RED P/T can easily be installed and can also be used in combination with glasses or contacts.
Technical details:
Monocular
Sampling rate 50 Hz (PAL)
Gaze position accuracy <0.5° - 1° (typ.)
Operating distance subject - camera 0.4 - 0.8 meters
Head tracking range 40 x 40 cm at 80 cm distance
Mobile data recorder: Aquila
The mobile data recorder Aquila is a flexible system supporting the investigation of driving behavior within actual vehicles. It is equipped with three infrared cameras and illuminators, one microphone and two junctions for CAN- or FlexRay-Buses. Additionally, the investigator’s marks can be logged. As all data are recorded synchronously, the behavior of the proband, the vehicle and partially the vehicle’s environment can be recorded in an extensive way. This allows a high accuracy and the opportunity to relate information to a certain point in time even lateron.
In further stages of extension, we plan the integration of eye trackers and GPS data.
Technical details:
Can be operated with 240V as well as 12V
Occlusion goggles
As a method for HMI assessment of IVIS the occlusion technique is applicable for both assessing the visual demands of driving and simulating the interruption caused by doing some other task while driving (...). The occlusion technique is defined as "measurement method involving periodic/ intermittent physical obscuration of the participant's vision or the obscuration of visual information unter investigation" (ISO/ TC22/ SC13/ N763R).
The binaural headset (BHS) by Head Acoustics is a system for mutual recording and replay of sounds. The headphone is equipped with two additional microphones close-by the ears, which makes it possible to investigate authentic acoustic signals completely detached from their original environment. This as well as the small size and the easy handling allow the alternate use within laboratory and vehicle. By means of the headset, we can for instance examine the use of warning signals within a vehicle. The BHS is connected to a mobile unit of recording and playback and can work several hours at a time. By means of a modern evaluation software, the data can be analyzed in our Usability Laboratory.
As a method for HMI assessment of IVIS the occlusion technique is applicable for both assessing the visual demands of driving and simulating the interruption caused by doing some other task while driving (...). The occlusion technique is defined as "measurement method involving periodic/ intermittent physical obscuration of the participant's vision or the obscuration of visual information unter investigation" (ISO/ TC22/ SC13/ N763R).