Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Lecture

Low Power Sensor Technology for IoT and Wearables

In course

EE-594: Smart sensors for IoT

This lecture provides insights in the design and technologies of Internet-of-Things sensor nodes, with focus on low power technologies. The lectures alternate every two weeks between sensing technologies of various kinds (prof. Ionescu) and their integrate ...

Description

This lecture covers low power sensor technology for IoT and wearables, focusing on activity sensors based on MEMS and an introduction to biosignals and biosensors. It discusses the basics of sensors, transduction mechanisms, inertial sensors, and transimpedance circuits. The lecture also explores MEMS motion sensors, accelerometers, gyroscopes, and transduction schemes for accelerometers. It delves into the implementation of capacitive MEMS accelerometers, displacement and acceleration basics, and the use of MEM capacitors. Furthermore, it addresses biosensors, biosignals, electrophysiological sensors, and wearable monitoring systems for health monitoring. The challenges for biopotential measurement systems are also discussed.

This video is available exclusively on Mediaspace for a restricted audience. Please log in to MediaSpace to access it if you have the necessary permissions.

Watch on Mediaspace

Official source

Ontological neighbourhood

Physics

Relativity: Special relativity

Related concepts (32)

Accelerometer

An accelerometer is a tool that measures proper acceleration. Proper acceleration is the acceleration (the rate of change of velocity) of a body in its own instantaneous rest frame; this is different from coordinate acceleration, which is acceleration in a fixed coordinate system. For example, an accelerometer at rest on the surface of the Earth will measure an acceleration due to Earth's gravity, straight upwards (by definition) of g ≈ 9.81 m/s2. By contrast, accelerometers in free fall (falling toward the center of the Earth at a rate of about 9.

Inertial navigation system

An inertial navigation system (INS) is a navigation device that uses motion sensors (accelerometers), rotation sensors (gyroscopes) and a computer to continuously calculate by dead reckoning the position, the orientation, and the velocity (direction and speed of movement) of a moving object without the need for external references. Often the inertial sensors are supplemented by a barometric altimeter and sometimes by magnetic sensors (magnetometers) and/or speed measuring devices.

Gyroscope

A gyroscope (from Ancient Greek γῦρος gŷros, "round" and σκοπέω skopéō, "to look") is a device used for measuring or maintaining orientation and angular velocity. It is a spinning wheel or disc in which the axis of rotation (spin axis) is free to assume any orientation by itself. When rotating, the orientation of this axis is unaffected by tilting or rotation of the mounting, according to the conservation of angular momentum.

Inertial measurement unit

An inertial measurement unit (IMU) is an electronic device that measures and reports a body's specific force, angular rate, and sometimes the orientation of the body, using a combination of accelerometers, gyroscopes, and sometimes magnetometers. When the magnetometer is included, IMUs are referred to as IMMUs. IMUs are typically used to maneuver modern vehicles including motorcycles, missiles, aircraft (an attitude and heading reference system), including unmanned aerial vehicles (UAVs), among many others, and spacecraft, including satellites and landers.

Wearable technology

Wearable technology is any technology that is designed to be used while worn. Common types of wearable technology include smartwatches and smartglasses. Wearable electronic devices are often close to or on the surface of the skin, where they detect, analyze, and transmit information such as vital signs, and/or ambient data and which allow in some cases immediate biofeedback to the wearer.

Related lectures (34)

Inertial Sensors: Accelerometer and Gyroscope

Explores the use of inertial sensors for gait analysis and wearable systems.

Capacitive Sensors: Inertial Sensors

Covers the principles of inertial sensors and drift removal techniques.

Rigid Body with Fixed Axis and Gyroscopes

Explores gyroscopes, their history, applications in aeronautics, and effects on rotating objects.

Gyroscope: Motion and Forces

Explains gyroscopic motion, moments of inertia, and precession principles.

Photoplethysmography: Signal Processing