TECHNICAL FEATURES

 

CharAT Ergonomics is programmed in C++ and designed for effective visualization. There are no compromise solutions in the software architecture and handling.

 

VARIABILITY:

 

Region, Gender, Age, Percentil, Proportion, Somatotye, Akceleration.

 

Furthermore customers can also use their own particular databanks.

 

The adjustment of design-configuration concepts, populations and tests is absolutely no problem.

 

 

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CHARAT SKELETON MODEL

 

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CharAT Ergonomics Skeleton Models consist of 110 bone elements. The absolute flexibility of the kinematic structure enables free adjustments throughout the design process to reach the analysis objectives.


The analysis organization will be immediately realized in a database management system. All the CharAT Ergonomics Services are integrated in it. Every record can be stored separately and integrated again in any subsequent project. This way the projects are 100% repeatable and together with the excellent level of documentation, they make a good base for ergonomists and designers to communicate.

For the animation of the models in different body postures, an intuitive interaction procedure with many adjustment options can be used. The rotatory and translational movements of the kinematic chain can be set in free space but they can also be directed to particular positions determined by the graphic environment. Fast and reliable positioning and inverse Biomechanics are available for the optimization of static/dynamic space demand and activity analysis.

 

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VISIBILITY

 

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CharAT Ergonomics can see your surroundings. Through a stereo subjective camera it displays the digital mock-up surroundings - what a human with the same head position would see. Viewpoint restrictions caused by glasses and masks can also be set. The design-concept assessment through the stereo subjective camera is compromise free.

 

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COLLISION DETECTION

 

The current position and the collisions with the surroundings of the models can be detected and recorded in real-time. The real-time detection of obstacles makes the optimization of static/dynamic space possible.

 

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DISCOMFORT ANALYSIS

 

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Using animation, CharAT Ergonomics automatically tests the physical strain of joints. These values can be issued numerically or as a graph. The real-time signal enable immediate and intuitive problem detection and the correction of the body position as well as comfort assessment.

 

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BODY FORCES

 

During the machine's life phases, activities involving the application of force occur. These activities are characterized by different postures, body movements, positions of limbs, and directions of force.


The Ergotyping tool "body forces" is used as a basis for the development of a methodology and a tool for the determination and assessment of body forces. The ergonomics tool can be used for both as-is analyses and strategy analyses.


It serves to qualitatively estimate and quantitatively determine isometric action forces in the arm-shoulder-system and the whole-body-system. Data from existing force standards has been examined and collected in different databases using a multidimensional indexing system. A people-oriented polar coordinate system was the first choice because it is anthropometrically independent and reproducible. All data already existing in polar coordinates was collected in the databases. Regarding the elevation angle, the azimuth angle and the arm spans, value ranges have been defined, for which the point of force application can be clearly assigned. 


Force data from the Montagespezifischer Kraftatlas ("Montage-specific Force Atlas", Wakula a. o. 2009) is available for posture variations. In order to clearly assign these to one of the body positions in CharAT, tolerance ranges have been defined in Cartesian coordinates for the position of the point of force application. The tolerance ranges for different percentile ranks have been differentiated according to gender. In a control dialog, the user can choose between evaluation procedures:

 

  • (normative) evaluation procedure, based on the maximum static action forces collected in the national force standards.
  • Montagespezifischer Kraftatlas ("Montage-specific Force Atlas").

 

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Effective and easy-to-use analysis tool

 

RULA

Rapid Upper Limb Assessment is now implemented in the CharAT Ergonomics system. This survey method has been developed to assist ergonomic analysis of such workplaces where work-related upper limb disorders were reported. A coding system has been defined to implicate the level of discomfort and a relevant to-do action list is generated by the RULA module to show the necessary steps of intervention in order to reduce the risks of injury due to excessive physical load on the operator.

 

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OWAS

The Ovako Working Posture Analysing System (OWAS), is now also implemented in the CharAT Ergonomics system. The OWAS module presents a practical method of identifying and evaluating poor working postures. The method consists of two major parts. There is an integrated analytical technique for the evaluation of working postures. On the other hand a set of criteria will be supplied for the redesign of working methods and places.





 

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