Glossary
Searchable terminology from accessibility, web standards, and related fields.
16 results found in Sensors.
- Activity Monitoring (Activity Recognition, Activity Tracking)
- The use of sensors, algorithms, and computational models to automatically detect and track a person's actions and behaviours within an environment. In assistive technology contexts, activity monitorin…
- Bio-Electrical Signal (Biosignal, Bioelectrical Signal, Physiological Signal)
- A bio-electrical signal is an electrical potential generated by biological processes in the human body, including muscle contractions (EMG), brain activity (EEG), eye movements (EOG), heart rhythms (E…
- Corneal Reflection (Pupil-Center Corneal Reflection, PCCR)
- An eye tracking technique that works by shining a near-infrared light at the eye and measuring the relationship between the reflection off the cornea (the bright spot called the glint) and the center …
- Depth Sensing (Depth Perception (computer vision), 3D Sensing)
- The ability of a sensor or system to measure the distance from itself to objects in the scene, producing a depth map or point cloud rather than a flat image. Common approaches include stereo vision (t…
- Digital Compass (Electronic Compass, Magnetometer)
- An electronic sensor that detects the Earth's magnetic field to determine the direction a person or device is facing, providing heading information in degrees or cardinal directions. In assistive tech…
- Electromagnetic Tracking (Magnetic Tracking, 6-DOF Tracking)
- Electromagnetic tracking is a position and orientation sensing technology that uses electromagnetic fields to determine the location and rotation of a sensor in three-dimensional space. Systems like t…
- Electrooculogram (EOG, Electrooculography)
- The electrooculogram (EOG) is a technique for measuring the electrical potential difference between the front and back of the eye using surface electrodes placed around the eyes. This corneal-retinal …
- Location Awareness (Location-Aware Computing, Location Sensing)
- The ability of a computing system to determine and respond to the physical location of a user or device, typically using GPS, Wi-Fi positioning, cellular triangulation, or other sensing technologies. …
- Multimodal Sensing (Multi-Modal Sensing)
- The simultaneous capture of data through multiple sensor channels - for example, combining physiological signals (heart rate, galvanic skin response, skin temperature) with behavioural signals (motion…
- Passive Infrared Sensor (PIR Sensor, PIR, Motion Sensor)
- A passive infrared sensor detects movement by measuring changes in ambient infrared radiation in its field of view — typically body heat from a person moving across the detection zone. PIR sensors are…
- Physiological Sensing (Biosensing)
- Measuring bodily signals - such as heart rate, galvanic skin response, skin temperature, respiration, or muscle activity - to infer aspects of a user's physical or affective state. Physiological sensi…
- RGBD Camera (RGB-D Camera, Depth Camera, Stereo Camera)
- A camera that captures both a colour (RGB) image and a per-pixel depth (D) measurement of the scene, yielding a 3D representation of the environment. Depth can be produced by stereo vision, structured…
- Signal Drift (Baseline Drift, DC Drift)
- Signal drift is the gradual, unintended change in the baseline level of a measured signal over time, caused by factors unrelated to the intended measurement. In bio-electrical sensing for assistive te…
- Surface Electromyography (sEMG, Surface EMG)
- A non-invasive technique for measuring the electrical activity produced by skeletal muscles, using electrodes placed on the skin over the muscle. Surface EMG is used in biomechanics, prosthetic contro…
- Ultra-Wideband (UWB, Ultra wideband)
- A short-range radio-frequency technology that uses very wide frequency bands (typically above 500 MHz) and very short pulses to enable centimetre-accurate distance and angle-of-arrival measurements be…
- Visual Evoked Potential (VEP, Visually Evoked Response, VERP)
- A visual evoked potential (VEP) is an electrical signal generated by the brain's visual cortex in response to a visual stimulus, typically a flash of light or a pattern change. VEPs are measured using…