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EngineWatch measures engine movements in 6D

09-05-2008 06:44 PM CET | Industry, Real Estate & Construction

Press release from: AICON 3D Systems GmbH

EngineWatch result presentation

EngineWatch result presentation

Braunschweig/Germany, September 4th, 2008 – In vehicle development, exact information about engine-to-body clearance is necessary to ensure an optimal design of the available space. For example, the engine must not collide with other parts in the engine bay when the driver changes gears or deals with difficult driving maneuvers. AICON’s optical measuring system EngineWatch is now available to measure engine movements precisely.

The system acquires engine movements in six degrees of freedom (6-DOF), both during a test drive and in a test station. Thus it replaces traditional devices such as mechanical travel sensors. The position and orientation of the measured points is depicted with absolute values in the vehicle coordinate system.

At the same time, it is also possible to monitor movements of other relevant parts in the engine bay, for example movements of the battery box. The optical measuring system EngineWatch works on a non-contact base i.e. without a mechanical connection between sensor and engine block. Therefore EngineWatch delivers reliable measuring results, also under extreme dynamic conditions. The measuring frequency goes up to 490Hz, and measuring data can be recorded for an unlimited period of time.

Functional principle
EngineWatch is built around the high speed camera TraceCam F. The camera consists of a high resolution CMOS sensor, an integrated high performance flash, and an image analysis processor. TraceCam F features extremely short shutter speeds of just a few micro-seconds that are necessary for long-duration tests. It also ensures the system is robust and stable over time.

Mounted on a fixture, the TraceCam F camera directly focuses the engine block. The measuring principle is based on the detection of relative movements of two solid bodies. Therefore reference targets are placed on the engine block and on the car body in a way that the camera will focus all targets at the same time. Setup and calibration of the system take less than 30 minutes. The position of the camera to the engine block does not need to be stable as EngineWatch recalculates its position continuously using the reference targets. Hence, camera movements cannot influence the measuring results.

The measuring images are analysed in the sensor. Thus only the digital data are transferred to the notebook computer in real time, not the entire images. EngineWatch calculates the positions of the measuring points in X, Y, Z, and the rotation angle (alpha, beta, gamma) as absolute values in the vehicle coordinate system. For the presentation of the results, a path-time-diagram is created showing the X, Y, Z movements in the vehicle coordinate system. In order to visualize the measured movements in a CAD system, the measuring results can be exported to post-processing software via an interface.

AICON will present the new measuring system at the following shows:
Automotive Testing Expo in Shanghai, China, Sept 17-19, booth 3006
Automotive Testing Expo North America in Novi, USA, Oct 22-24, booth 6011

AICON 3D Systems is one of the world leading providers of optical camera based 3D measurement systems. AICON develops and distributes systems for the business areas of inspection and testing including car safety and tube inspection. With AICON’s latest products for automated test and process control, the company enters new worldwide market fields. The majority of AICON’s clients operate in the automotive and aerospace market.

AICON Press Contact:
AICON 3D Systems GmbH
Jutta Thiel
Biberweg 30C
D-38114 Braunschweig
Tel.: +49 (0)531 – 58 000 70
Fax: +49 (0)531 – 58 000 60
Email: jutta.thiel@aicon.de
www.aicon3d.com

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