Glossary

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Impulse Engine(also: Impulse Engine 3000)

The Impulse Engine 3000 was a force-feedback haptic device manufactured by Immersion Corporation in the 1990s, used for research into haptic interfaces and virtual reality. The device featured a probe that users manipulated in three degrees of freedom (forward/backward, up/down,…

Inertial Measurement Unit(also: IMU)

An electronic sensor module that combines accelerometers and gyroscopes (and sometimes magnetometers) to measure motion, orientation, and gravitational forces. IMUs are embedded in smartphones, smartwatches, and other wearable devices, where they can detect gestures, track…

Inertial Sensors(also: IMU, Inertial Measurement Unit)

Electronic sensors that measure motion and orientation, typically including accelerometers (measuring acceleration/tilt), gyroscopes (measuring rotation), and magnetometers (measuring magnetic field/compass heading). In accessibility applications, inertial sensors enable indoor…

Inertial measurement unit(also: IMU)

A sensor device that combines accelerometers, gyroscopes, and sometimes magnetometers to measure and report body movement, orientation, and gravitational forces. IMUs are widely used in assistive technology and accessibility research for gesture recognition, body pose…

Infrared Emitting Diode(also: IRED, IR LED, Infrared LED)

A light-emitting diode that produces infrared radiation, used in assistive technology for motion tracking and position sensing. IREDs are commonly used in head-tracking systems, eye-tracking devices, and other assistive input methods where a camera detects the infrared light…

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