State of the Art Sensing: 132 A.D.

Transcription

1 State of the Art Sensing: 132 A.D.

2 And today Image sensor Capacitive touch screen GPS Compass Proximity sensor Light sensor 3 axis accelerometer Gyroscopic sensor GPIO WWAN WLAN WPAN The Point? The ways in which we interface physical data are changing And the rate of change is accelerating

3 Trends in Sensing MEMS, nano technologies Intelligent sensors embedded local processing power Low power or zero power Dedicated wireless technologies Smaller Smarter Less Power What do These Trends Mean? Profound increase in number of sensors deployed Increasingly challenging locations Network boundaries are relentlessly stretched to reach them

4 Communications at the Edge Future sensors are not just passive inputs they re smart We re taking networking into environments that neither Metcalf nor Cisco envisioned Goodbye RS-232 Reports of my death Forecast: 4% growth in RS-232 and RS- 485 chipsets Tips & Tricks RS-232 Tens of meters Poor noise immunity Tens of kbps Isolation recommended RS meters Excellent noise immunity Hundreds of kbps Unbalanced twisted pair Isolation required Resist the temptation to terminate

5 Serial Solutions: Extend Serial Solutions: Isolate

6 Serial Solutions: Convert USB Ubiquitous with rapid adoption in instrumentation of all kinds Convenient PC-to-peripheral interface; fast, integrated power Tips and Tricks 5 meter limit is real Troublesome connector use high retention versions Twisted pair = inherent noise immunity, but designs are typically consumer grade Use care prone to EMI No isolation be careful when interfacing to the physical world! O/S and applications vary in their reaction to EMI errors

7 USB Solutions: Extend Extend USB over Cat5 cable or fiber Or, extend USB over a LAN/WAN with USB to Ethernet bridging USB Solutions: Isolate Break the ground loop between devices USB to Serial, or USB to USB

8 USB Solutions: Convert Easily convert USB to RS-232/422/485 Single or multiple ports Always recommend isolated converters Convenient no external power required USB Solutions: Connector Standard USB connector a bit wimpy Use enhancedretention connectors Strong enough to pass UL Class 1 Div 2 hazardous location requirements (15N-m)

9 Ethernet The world has gone IP IPv6 and 6lowPAN are enablers for sensor networks Strategy: Convert to IP as quickly as possible Device management, broad toolsets, unequalled interoperability, backhaul Ethernet Solutions: Extend Wired DSL technology based DSL allows use of any copper pair Typically capable of >>1000 meters Ideal for retrofits

10 Ethernet Extended: Fiber Very high performance connectivity Media converters allow fiber close to the sensor Speeds > 1Gbps Distances up to 100Km Ethernet Solutions: Extend Wireless Highest performance solutions are based n enables 150 Mbps or more Advanced antenna technology provides range up to 15 km

11 Ethernet Solutions: Convert Readily connect 232 and 485 devices to Ethernet Plethora of I/O adapters available The faster you convert to IP, the faster you get to standardsbased tools and infrastructure Wireless - WWAN - Cellular Cellular provides managed infrastructure with very good (almost great) reach Data plans becoming more M2M friendly Strategic market for wireless carriers One cellular backhaul connection can support hundreds of local sensors

12 Wireless WLAN - Wi-Fi Pervasive interoperable- free infrastructure but your responsibility Beginning to address sensor market with lite chipsets adapted to micro power and low BW requirements Wins the convert to IP strategy race Flexible, supports both end-point and aggregator roles Wireless WPAN Bluetooth 4.0 technology to watch Maximum component volumes, R&D Smart phones are ubiquitous gateways Chipsets: where goes Wi-Fi, also goes Bluetooth m, low latency, high efficiency Optimized for sensor data Fails convert to IP race

13 Wireless Mesh WirelessHART, ISA100.11a, ZigBee, Wi-Fi Focused on Wireless + Sensor problem Significant development in this family of technology Clearly starting to address many of the issues Summary Technology advances are enabling prolific sensing Sensors systems design will become synonymous with network design Serial USB Ethernet Wireless technologies will each play a part IP-based technologies are expanding boundaries and reach in preparation

14 Thanks and Questions Andy Ross Product Manager of /Wi-Fi B&B Electronics (760)