DAVIS-CAR is a Test Data Management System designed for the
development and validation of systems in automotive and associated supplying industries.
Outstanding feature: The system integrates classical test data and
the associated audio and video information (A/V data).
Substantial benefits for the user are the simple system operation
combined with a high level of flexibility.
DAVIS-CAR particularly shows its strength in test analysis:
Test engineers can synchronize the actual test data with A/V
recordings of ambient situations.
Displayed together the integrated data make interrelations easily visible.
Thus, the analysis of simulations and tests is facilitated and less time-consuming.
Integrated
integrated analysis of measured values and audio/video information
Mobile
utilization of notebooks enabling mobile data acquisition
Flexible
high level of flexibility due to modular architecture, parameterization capability
and open interfaces
Time saving
short set-up times due to the use of measurement scenarios
Versatile
event-driven data acquisition
visualizing of objects
reproduction of stored signals
for hardware-in-the-loop set-ups
The two flows of information are evaluated simultaneously.
This way, findings that could not be established with conventional test systems
or which required considerable efforts, can now be achieved easily.
The main fields of application are:
Development and Application of Driver Assistance Systems
The synchronous display of sensor data and measured values from a vehicle
integrated with a video recording of the current ambient situation enables the developer
to asses the system under test within a short period of time. Prior to their delivery,
the developed systems just have to be adjusted to the end customer's specific requirements
(application engineering).
Physiological Studies in Simulated Environments
Due to a comprehensive, simultaneous analysis of video recordings of a test person in
a simulator combined with measurements from the simulator or the test person it is
possible to draw conclusions about the factors influencing the test person's
behavior in specific situations.
The modular architecture and the versatile customization options of DAVIS-CAR ensure that
the system can flexibly be adjusted to the requirements of any project. And yet, system
configuration is really simple. Various scenarios can be predefined; thus providing a
set of typical system set-ups. This way the time required to prepare a particular
test situation can be reduced considerably.
Usually, various measuring instruments are applied to capture test data. Apart from
conventional analogous and digital input/output, field bus systems are increasingly used
in the automotive industry. In order to cope with the large variety of different protocol
and telegram structures, DAVIS-CAR provides a simple and flexible interface to describe
the telegrams and their contents by means of a table.
Moreover, there is an integrated configuration management. It ensures that for
each stored data record the associated configuration data is available and
considered for the specific evaluation. Thus, the same system can be applied
in various environments. Based on the associated configuration the required
test channels and telegram structures are available.
DAVIS-CAR employs event-triggered data storage functions. The active test signals
are continuously monitored for predefined trigger conditions. As soon as one of the
conditions is met, all active channels as well as the associated configuration data
are saved as defined by the respective trigger settings.
A comfortable editor enables DAVIS-CAR users to specify any number of trigger conditions.
With this editor the user can easily define the trigger conditions as logical expressions
of the required signal states. This way, DAVIS-CAR can even acquire rare events which may
occur only in very specific situations. The configurable online display of test data along
with the audio/video stream allows a first verification of the results and an assessment
of the experiment's success.
DAVIS-CAR enables the integrated representation of A/V data and test data for analyzing
and evaluating tests and experiments. At a glance the operator gets an overview of the
measured values and events; the analysis of simulations and tests is facilitated and
requires less time.
Beyond the display of test data and diagrams, DAVIS-CAR is also able to visualize objects.
The system uses an open interface to determine and mark the correct position of an object
within the video stream in realtime. This is done on the basis of coordinates delivered by
sensors like radar or ultrasonic scanners. DAVIS-CAR automatically considers the different
positions of cameras and sensors. The system can guide the operator interactively. Thus he
can specify required parameters, any time and at any place. That means, the test engineer
may exchange a sensor while the field experiment is running and can, there and then, make
any needed adjustments of the system parameters within an instant.
The possibility to reproduce stored signal sequences and to use them as stimulus for
hardware-in-the-loop testing completes the application range of DAVIS-CAR. With this
feature DAVIS-CAR also supports the realistic and reproducible simulation of test
situations. The hardware-in-the-loop configuration can reduce time-consuming and
expensive test drives to a minimum; modifications of the test vehicle can be retested
without much delay and under conditions close to reality.
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