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WIP xr-perception

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Erwan Normand
2024-09-27 22:11:28 +02:00
parent a9319210df
commit 344496cbef
19 changed files with 270 additions and 366 deletions
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1-background/related-work/2-wearable-haptics.tex
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@@ -135,7 +135,7 @@ Several types of vibrotactile actuators are used in haptics, with different trad
An \ERM is a direct current (DC) motor that rotates an off-center mass when a voltage or current is applied (\figref{precisionmicrodrives_erm}). \ERMs are easy to control, inexpensive and can be encapsulated in a few millimeters cylinder or coin form factor. However, they have only one \DoF because both the frequency and amplitude of the vibration are coupled to the speed of the rotation, \eg low (high) frequencies output at low (high) amplitudes, as shown on \figref{precisionmicrodrives_erm_performances}.
\begin{subfigs}{erm}{Diagram and performance of \ERMs. }[][
\begin{subfigs}{erm}{Diagram and performance of an \ERM. }[][
\item Diagram of a cylindrical encapsulated \ERM. From Precision Microdrives~\footnotemark.
\item Amplitude and frequency output of an \ERM as a function of the input voltage.
]
@@ -357,9 +357,9 @@ We describe them in the \secref{vhar_haptics}.
Haptic systems aim to provide virtual interactions and sensations similar to those with real objects.
The complexity of the haptic sense has led to the design of numerous haptic devices and renderings.
While many haptic devices can be worn on the hand, only a few can be considered wearable as they are compact and portable, but they are limited to cutaneous feedback.
If the haptic rendering is timely associated with the user's touch actions on a real object, the perceived haptic properties of the object can be modified.
Several rendering methods have been developed to modify the perceived roughness and hardness, mostly using vibrotactile feedback and, to a lesser extent, pressure feedback.
However, not all of these haptic augmentations have been already transposed to wearable haptics.
If the haptic rendering of the device is timely associated with the user's touch actions on a real object, the perceived haptic properties of the object can be modified.
Several haptic augmentation methods have been developed to modify the perceived roughness and hardness, mostly using vibrotactile feedback and, to a lesser extent, pressure feedback.
However, not all of these haptic augmentations have been already transposed to wearable haptics, and use of wearable haptic augmentations have not been yet studied in the context of \AR.
%, unlike most previous actuators that are designed specifically for fingertips and would require mechanical adaptation to be placed on other parts of the hand.
% thanks to the vibration propagation and the sensory capabilities distributed throughout the skin, they can be placed without adaption and on any part of the hand