Haptic Devices: Sensorized Thimble

The Background: In a haptic interface, the human subject interacts with a virtual display which he or she can modify based on visual, tactile, or kinesthetic feedback. In haptics applications, a properly-fitting mechanism is required to allow the user to push, squeeze, or grasp an object.

The Challenge: Developing a small, light-weight, force-sensing equipped device which can be easily maneuvered by the user and which will encourage “natural exploration” of objects.

Sensorized Thimble Sensorized Thimble Photo
CAD drawing and subsequent prototype of haptic thimble developed at Universidad Politecnica de Madrid. Components 1-4 are Tekscan’s FlexiForce Sensors

The Solution: Researchers at Universidad Politecnica de Madrid integrated FlexiForce® sensors into a lightweight (8 grams) thimble device, which fits over the user’s fingers. The geometry of the device is quite similar to the human finger. Due to its construction, it provides more freedom and natural exploration of objects than some traditional haptic end effectors. FlexiForce sensors are used to estimate the forces exerted by the user during varioue manipulations. FlexiForce was selected due to its thinness (0.2mm), light weight, and performance specifications, particularly its repeatability, which is +/- 2.5%.

FlexiForce sensors are fully customizable to suit your unique OEM application. Standard sensors are also available for proof of concept, or for a quick, low quantity, R&D solution.

Benefits:

  • Ultra-thin sensor construction and flexibility means minimal interference/ disturbance to normal action
  • Accurate response gives your customers and end users confidence in the performance of your product
  • Knowledgeable/experienced technical staff help you develop the most effective, economical sensor based on your specific requirements. All manufacturing takes place at ISO 9001 & 13485 certified Tekscan headquarters.
  • 100% factory inspection ensures your sensors meet established performance specifications.

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