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Solution


Vehicle Interface Force Testing

Automotive navigation interfaces have grown increasingly complex. Unlike traditional physical buttons, touch screens provide no tactile confirmation, which causes drivers to visually verify inputs on the vehicle’s touchscreen. Automakers need to test the haptic feedback to confirm user touch input through the vehicle’s onboard systems is working properly.


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Summary

  • Customer Need / Challenge

    Automotive navigation interfaces have grown increasingly complex. Unlike traditional physical buttons, touch screens provide no tactile confirmation, which causes drivers to visually verify inputs on the vehicle’s touchscreen. Automakers need to test the haptic feedback to confirm user touch input through the vehicle’s onboard systems is working properly.

  • Interface Solution

    Interface’s SMTM Micro S-Type Load Cells were installed behind the bezel mount points of the vehicle’s touchscreen interface, with Load Cell Load Buttons passing through each load cell to secure both the load cell and the screen assembly. When the user tapped the screen, the SMTM measured the contact force, and the analog output was captured through the compact, high-speed 9330 indicator. The measurements can be captured using the 9330 Battery Powered High Speed Data Logging Indicator through an SD card, or another laptop directly.

  • Results

    With Interface’s force measurement solution, the automotive system could accurately detect user touch input and provide haptic feedback confirmation.

Materials


  • SMTM Micro S-Type Load Cells
  • Load Cell Load Buttons
  • 9330 Battery Powered High Speed Data Logging Indicator with supplied BlueDAQ Software
  • Car interface undergoing test

How it Works


  1. The SMTM Micro S-Type Load Cells are mounted behind the bezel attachment points of the vehicle’s interface or display, with Load Cell Load Buttons passing through each sensor to secure the assembly.
  2. When the driver taps the display surface, the SMTM’s measure the applied contact force.
  3. The SMTM’s are connected to the 9330 Battery Powered High Speed Data Logging Indicator, with included BlueDAQ software, where force results from the touch-pad test can be captured using an SD card, then displayed on another PC or laptop.

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Products Used in this App Note

Load Cell Load Buttons

SMTM Micro S-Type Load Cell

9330 Battery Powered High Speed Data Logging Indicator