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design & products EMMS technologies & environmental sensors Omron has developed a low-cost wireless ultra-low frequency seismic sensor to distribute throughout sections of Japan to give immediate tactical information about earthquakes worldwide using batteries that last 15 years. The company says it could cover the entire Earth with 2.4 billion units. (Source: Omron) Omron has also developed a multipurpose version that measures not only seismic vibration, but temperature, humidity, pressure, light, ultra-violet (UV), and noise for worldwide situational awareness that could also cover the globe like a nervous system for the Earth. (Source: Omron) sure, light, ultraviolet (UV) and noise in a single unit with a 15 year battery lifetime. Omron estimates that the entire populated areas of the Earth could be covered with these universal detectors with just 2.4 billion sensors (a windfall for Omron for sure). With such a network of sensors, Omron estimates that it could not only monitor, but anticipate natural disasters in enough time to warn citizens to flee to higher ground (for tsunamis), to head for shelters (for earthquakes) and to reduce the most devastating effects of natural disasters, namely buildings collapsing, tsunami’s and widespread out-of-control fires. In particular, image the different results in Fukushima, if the reactors had already gone into shutdown mode and all the critical valves had already been shut long before the tsunami hit there. “Not only could people be warned about where safe The company has designed edge-routers that digest the raw data from its sensors sending only managed low-frequency traffic up to the cloud where high-level analytics can keep track of every spot on the Earth. (Source: Omron) places are to go before a disaster, but damage estimates could be immediately made in real time, accessing which areas are in most need, reduce the risk of secondary disasters and identify to people where to go in the aftermath, such as the nearest hospital that is still operating,” Sekiguchi said. Currently, Omron is perfecting the infrastructure by which raw sensor data can be concentrated into only the most important parts, using local smart routers, which can then send summaries to managers and the cloud where sophisticated high-level analytics can be run on high-performance computers (HPCs). Hopefully these analytics will be able to use deep learning to get better and better at anticipating disasters of all types—from earthquakes to volcanos erupting, making all the people of the Earth a little safer. Signal conditioner preps data from consumer pressure and thermopile sensors IDT’s ZSSC3224 is a 24-bit sensor signal conditioner (SSC) IC designed for energy-efficient designs with consumer barometric pressure and thermopile sensors. The part is one of the first released by the former ZMDI (Dresden, Germany) since its acquisition by IDT in 2015. The device has an integrated 26-bit digital signal processor (DSP) for linearisation and calibration functions, for high-resolution consumer, industrial, white goods and medical applications, as well as phones and tablets, and joins a family of SSCs designed for high-end sensor modules: it delivers high-accuracy amplification and a 24-bit precision full-featured analogue-to-digital converter. The ZSSC3224 is suitable for high-precision measurement systems, including barometric altitude measurement for portable navigation or emergency call systems; altitude measurement for car navigation; pressure measurements inside hard discs; and weather forecasting equipment. The device—available in die and wafer form—can also adapt thermopile sensors to enable contactless temperature measurements of objects or human body temperature. Michael Georgi, product marketing manager, adds, “The device is designed for use with resistive pressure sensors as well as absolute voltage sensors such as thermopiles. A stacked die assembly, combined with a dedicated MEMS sensor element, can provide the lowest form factor on the market for MEMS-based sensors.” Targeting batterydriven, low-power devices, features such as 1 mA typical overall current consumption, 20 nA typical sleep mode current, and a 1.68V to 3.6V power supply range combine with an intelligent power-save scheme to help ensure the lowest overall current consumption. The device also offers internal filter options for low noise output signals and intelligent alarm and interrupt capabilities. The ZSSC3224 eliminates the need for an external buffer capacitor and it provides power supply rejection ratio (PSRR) of up to 90 dB at 2V, making it attractive for applications in harsh environments. Digital compensation of signal offset, sensitivity, temperature and non-linearity is accomplished via an internal correction algorithm with coefficients stored on-chip in a reliable, nonvolatile, programmable memory. Other features include: Quadratic form factor, optimised for stacked die assembly; operating temperature range:-40°C to 85°C; programming via software provided in the evaluation kit; accuracy better than ±0.10% full-scale output. IDT www.idt.com 44 Electronic Engineering Times Europe February 2016 www.electronics-eetimes.com


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