MoveInspect DPS

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Online 3D dummy positioning in vehicle safety testing

  • Mobile measuring head with 4 digital cameras and wireless probe combines 3D ositioning and measuring capabilities
  • Fast and easy dummy positioning, in any location, within a few minutes
  • User independent and repeatable positioning according to international regulations


Importance of passenger protection increases

In new car development, crash and sled tests are conducted in order to minimize the passengers' risk of injury. Both complete vehicles and single components such as airbags or belt systems are analysed. In order to receive necessary approvals, car manufacturers have to respect a multitude of standards and regulations. Additionally, many of them perform further analyses so that they can assure an optimal safety level. Since more and more new vehicle models are now supposed to be launched ever faster than before, the need for supporting optical metrology increases dramatically, offering enhanced productivity and efficiency that is required to shorten test cycle times.

Application oriented systems solutions
With its portable industrial measurement system DPAPro and software solutions for camera calibration, AICON has already made its mark as a leading supplier of optical metrology for vehicle safety testing. AICON now offers two complementary systems, ProCam for pre- and post-crash vehicle measurement, and DPS for real-time dummy positioning. With application specific templates based on the AICON 3D Studio software, each features a precise, fast, and easily operated user interface, tailored to the task at hand.

The right position is essential
When performing a crash test, it is essential that the dummy is positioned and seated in the vehicle according to the regulations the test is based on.

How DPS works
The DPS (dummy positioning system) consists of the DPS measuring head, comprising four high resolution digital cameras with infrared ring flash, a portable PC for system control, a wireless probe, accessories to target the points on the dummy, and the software module DPS in AICON 3D Studio. The synchronised cameras capture 3D object points at a frequency of up to 5Hz. The points are from targets either fixed on the dummy or on target point adapters. Using the wireless probe, DuPos can also be used as a portable CMM. DPS combines the qualities of a 3D positioning system with those of a mobile CMM.

Mobile Application
For its mobile application, the DuPos measuring head is integrated as a complete system into a cart including a PC for system control, a non-interruptible power supply and accessories. The location of DPS can be changed quickly and it is immediately ready for operation. No setup time accrues. The active infrared ring light allows for reliable measuring independent of any surrounding light.

Easy dummy positioning: software module DPS
The software module DPS has been specially developed for the purpose of dummy positioning. Combined with the DPS system, it serves as optical 3D positioning equipment that controls the 3D position of the dummy relative to the vehicle during the positioning process. Thanks to the DPS software, the current dummy position is recorded in real time, and compared to nominal data. The differences between the target positions and reference positions are displayed graphically or numerically. With all points on the dummy measured and displayed simultaneously in vehicle coordinates, the technician can quickly put the dummy into its target position. Movements of the vehicle that are caused by the positioning of the dummy are compensated automatically because of continuous monitoring of a set of targeted reference points.

The system allows for the measurement of additional coordinates of single points, lengths or angles with the probe according to a pre-defined measuring plan. The results are shown in a measurement report. Further individual processing via an XML export is available.

Application for both sled and crash barrier facility
AICON's DPS is the only system for dummy positioning that is able to simultaneously record multiple measuring points in vehicle 3D coordinates. The user can conduct a complete positioning including preparation and additional measurements within a few minutes. The portability of the system makes it applicable for dummy positioning both in vehicles for crash barrier and on bucks for sled tests. The high positioning accuracy guarantees reproducible, user independent results and facilitates the comparison to simulation data.

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