Implementing heart rate variation measurement in a wristband: a small, robust and accurate optical solution
Monitoring the behavior of a person’s heart can reveal immensely valuable information about their health, lifestyle and even emotional state, as well as the early onset of heart disease. In a medical setting an ECG chest strap, however, is cumbersome, uncomfortable and expensive, with restricts its use to medical settings and high-end sports equipment. Might it be possible to capture ECG-like data about heart rate variability in a convenient, easily wearable device? This article describes the technical challenges involved in reliably capturing continuous heart rate variation measurements with a wristband, and compares its performance with a reference standard set by an ECG chest strap. The new highly integrated ams’ AS7000 biosensor enables designers to realize a simpler, more comfortable and cheaper implementation of HRM in a wristband than previous systems using multiple discrete components.
How spectral sensors enable LED lighting systems to increase crop yields in vertical farming and greenhouses
Traditionally, agricultural settings have used high-pressure sodium (HPS) lamps as an artificial light source. LED manufacturers are introducing lighting with better and richer spectral characteristics that offer low power consumption, radiate little heat and operate over a longer span. This article discusses how sensor enable these LED solutions and the benefits of LED versus HPS.
Sensors Enable the Smart Home
Consumer acceptance and demand for “smart home” capabilities must be driven by the simplicity of use and perceived value those smart home services deliver. Real-time sensing is the critical touch-point behind delivering both simplicity and value, enabling the IoT’s “things” to deliver their service.
New small, low-power MOX VOC sensors: how might they be used for indoor air quality monitoring?
Stories in the news media are heightening people’s awareness of the importance of the quality of the air we breathe. The average human inhales about 15kg of air a day, 80% of it indoors. And while the quality of outdoor air is routinely monitored by public agencies, Indoor Air Quality (IAQ) monitoring is the responsibility of the building’s operator. A new generation of small, surface-mount, low-power VOC (volatile organic compound) gas sensors offering the potential for distributed, local IAQ monitoring by small and affordable devices. This article explains the operation of these new VOC sensors and the differences between them and absolute single-gas sensors. It also shows how they can provide data which enables air management equipment to respond most efficiently and effectively to variations in indoor air quality.
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