A light source and photosensor combine for effective, reliable, non-contact proximity detection of nearby objects. Part 1 of this article looked at the principles and three basic approaches to optical proximity sensing, also called photoelectric sensing. This part looks at physical implementations of the system, input/output specifics, and other considerations. Q: Is this a relatively […]
Frequently Asked Question (FAQ)
FAQ on optical proximity sensing: part 1
A light source and photosensor combine for effective, reliable, non-contact proximity detection of nearby objects. Non-contact proximity sensors detect the presence or absence of nearby objects (including animals and people) using basic physics phenomena such as capacitive and inductive electromagnetic fields, light, or sound. Many techniques are used for this sensing, each offering different operational […]
How will neurotechnology and sensing impact automotive: part 2
Neuro data provides a level of insight into the driver’s condition and cognitive state that is not possible with a driver-facing camera.
How will neurotechnology and sensing impact automotive: part 1
EEG sensing can improve driving safety.
What are the defense applications of electro-optical sensors?
Electro-optic sensors span a wide range of technologies, from various types of imaging devices to infrared (IR) detectors. They are used for various defense applications that enhance situational awareness, including intelligence, surveillance, and reconnaissance (ISR), search and rescue, threat detection and target identification, and protection against IR-guided missiles. Electro-optic and IR (EO/IR) sensors convert electromagnetic […]
What’s new in sensors for smart homes: part 3
Air quality sensors have been measuring and monitoring outdoor air quality applications for many years. More recently, they have been used more frequently for indoor applications in smart homes and connect to the home’s Wi-Fi network. One of the more unique sensed items is radon. Similar to other harmful gases, people cannot see or smell […]
How do facial recognition biometrics work?
Facial recognition biometrics is an advanced form of image recognition based on artificial intelligence (AI) and machine learning (ML). It can be used on still or video images. This article begins by discussing the basics of facial recognition, including facial detection and feature extraction using convolutional neural networks (CNNs). It then moves on to consider […]
How do ear recognition biometrics work?
In the era of face masks, ear recognition can provide a viable alternative to more commonly used facial recognition. The human ear remains relatively unchanged, making it suitable for security authentication applications. It can also be easier to extract information from since it is not subject to variations like facial expressions. Ear recognition biometrics analyze […]
What’s new in sensors for smart homes: part 2
As noted in Part 1, some of the latest offerings for smart home sensors are based on sensor integration, technology, and connectivity. However, identified needs have created new applications that were not possible, simply not considered, or only offered for businesses — until recently. For example, the smart shelf was offered to retailers over 20 […]
What’s new in sensors for smart homes: part 1
In Cognitive Market Research’s recently published 7th edition of Home Smart Sensors Market Report 2024, the report’s author says the global home smart sensors market will witness significant growth soon. In addition to sensors for heating, ventilating, and air conditioning (HVAC) systems and lighting systems, sensors for safety and security are specifically addressed in the […]
