Indoor device-free localization and tracking can bring both convenience and privacy to users
compared with traditional solutions such as camera-based surveillance and RFID tag-based …

Pyroelectric infrared (PIR) sensors are widely used as a presence trigger, but the analog
output of PIR sensors depends on several other aspects, including the distance of the body …

An increasingly common requirement of computer systems is to extract information
regarding the people present in an environment. In this article, we provide a survey of the …

State-of-the-art sensors use active electronics to detect and discriminate light,,, sound,,
vibration, and other signals,. They consume power constantly, even when there is no …

An Internet of Things (IoT) enabled intelligent sensor node has been designed and
developed for smart city applications. The fabricated sensor nodes count the number of …

Passive IR (PIR) sensors are excellent devices for wireless sensor networks (WSN), being
low-cost, low-power, and presenting a small form factor. PIR sensors are widely used as a …

We present a wireless sensor network (WSN) for monitoring indoor air quality, which is
crucial for people's comfort, health, and safety because they spend a large percentage of …

Pyroelectric infrared (PIR) sensors are widely used as a simple but powerful people
presence triggers, eg, automatic lighting systems. In particular, by alternating the effective …

This paper presents a wireless distributed pyroelectric sensor system for tracking and
identifying multiple humans based on their body heat radiation. This study aims to make …

We present Pyro, a micro thumb-tip gesture recognition technique based on thermal infrared
signals radiating from the fingers. Pyro uses a compact, low-power passive sensor, making it …