Meaning
Configuration of multiple sensors used to map the distribution of strain across a large surface area. Monitoring the deformation of a battery pack during a crash or high pressure event requires data from several points simultaneously. A strain gauge array provides a detailed view of how a structure bends or stretches under load.
This network of sensors translates the physical deformation into a set of electrical signals that can be analyzed to find areas of high stress.
Stress Mapping
Visualizing the distribution of force helps engineers identify where a housing might need reinforcement. The strain gauge array captures the variation in displacement across the surface of a cell or the walls of a module. This information is used to validate the computer models used in the design phase.
Sensor Placement
Strategic positioning of the individual gauges ensures that the most critical areas are monitored. A well designed strain gauge array covers the corners and mounting points where failure is most likely to occur. The spacing between the sensors determines the resolution of the resulting stress map.
Real Time Monitoring
Information from the sensors is captured continuously during the duration of the physical test. Because the strain gauge array provides immediate feedback on the health of the structure, it can be used to trigger an emergency stop if the deformation exceeds a safe limit. The integrated software processes the signals to show the movement of the stress front as the load increases.
This allows for the observation of material yielding before a total break occurs.
