Embedded Compu+ng. Bill Drake Strategic Technology Manager Emerson Climate Technologies White Rodgers

Transcription

1 Bill Drake Strategic Technology Manager Emerson Climate Technologies White Rodgers

2 Design and Opera+ng Constraints Power Cost User Interface I/O Heat Opera+onal Timing Robust Opera+on Recovery Security Compliance

3 Design and Opera+ng Constraints Power BaHery Type of BaHery» Rechargeable» Connector Constraints» Costs of Cables and Chargers» One Time Use Legal requirements for recycling, charging, disposal? Opera+ng length of +me on one cycle? Physical size constraints?

4 Design and Opera+ng Constraints Cost Processor System CPU, Memory, I/O Manufacturing Costs BGA Lead/Lead Free Assembly Tes+ng Design Tool Costs Integrated Development Environment Opera+ng System

5 Design and Opera+ng Constraints User Interface Limited Number of Indicators Limited Number of Ac+vators (pushbuhons) Must factor in power requirements Must factor in opera+ng system/+ming constraints Interrupt structure must provide for user feedback +ming Cost of Interface components

6 Design and Opera+ng Constraints I/O Real +me signal requirements Communica+on requirements Interrupt system structure to support real +me and communica+on opera+on System on chip versus components Peripheral connec+ons Cost

7 Design and Opera+ng Constraints Heat Wasted Energy Interacts with I/O, User Interface and Sensors Affects BaHery Life/power supply requirements Packaging must enable dissipa+on of excess heat Opera+ng in cold environments must provide heat to enable opera+on Temperature Range of opera+on must be taken into account when choosing components Cost impacts

8 Design and Opera+ng Constraints Opera+onal Timing Resonator vs. crystal Stability requirements Affects on power requirements Processor speed Interrupt servicing requirements Memory cycle requirements Manufacturing constraints Cost

9 Design and Opera+ng Constraints Robust Opera+on Opera+ng Environment Heat/Cold/stability Electrical Noise Tolerance for component degrada+on Legal and Liability Requirements Medical applica+ons AircraW Home Automa+on Toys

10 Design and Opera+ng Constraints Recovery Watchdog Timer Human Interven+on? Over The Air Reprogramming Connected Reprogramming Serviceable components Cost

11 Design and Opera+ng Constraints Security Compe+tors/Hackers stealing the opera+ng code Compe+tors/Hackers subs+tu+ng opera+ng code Legal requirements regarding any data in the system Legal requirements regarding data communica+ons with the system Affects on the processor, memory, other design components Cost

12 Design and Opera+ng Constraints Compliance FCC, CE, IC, R&TTE, Telec HIPPA WiFi, ZigBee, Z- Wave, Bluetooth NEMA ASHRAE Consumer Product Safety Commission Trade Compliance OSHA California Title 24 Chemical and Recycle Labeling Cost Considera+ons

13 Concept of New Motes Exis+ng Motes operate with IEEE Consider design of new motes with alternate wireless technologies IEEE Bluetooth Basic Rate Bluetooth High Rate Bluetooth Low Energy 900 MHz (North America)/800 MHz (EU)/ Other Other band?

14 Concept of New Motes Power Cost User Interface I/O Heat Opera+onal Timing Robust Opera+on Recovery Security Compliance

15 Concept of New Motes Processor Requirement? ARM Texas Instruments Freescale Energy Micro Microchip ST Toshiba Samsung

16 Concept of New Motes User Interface Provisioning Opera+ng Status Control Signal Strength Indica+on Loss of Signal Indica+on Power Status I/O func+on status

17 Concept of New Motes Opera+ng Environment Temperature Range Wireless Environment Desired Communica+on Range Industrial Commercial Consumer Aerospace Outer space

18 Concept of New Motes Size? Manufacturing constraints BGA? Lead Free Other Power

19 Concept of New Motes Opera+ng System RTOS Scheduler None Linux Impact on Memory and Processor Requirements?

20 Concept of New Motes Power - Cost User Interface - I/O - Heat - Opera+onal Timing Robust Opera+on Recovery Security Compliance

21 Wireless Sensor Networks Wireless Applica+ons Long Range Licensed Bands Oil Pipeline Management Natural Gas Pipeline Management City Water Departments Power Distribu+on Advantages No one else allowed to use your frequency Disadvantages Cost and +me delay for licensing Limited number of licenses available

22 Wireless Sensor Networks Wireless Applica+ons Short Range Unlicensed Bands Industrial Sensor Systems Machinery Vibra+on Monitoring Cement Plant Rota+ng Kiln AircraW Carrier Elevator Controls Pharmaceu+cal Process Control Mobile Plaform Monitoring silicon wafer processing Refinery Tank Farm Monitoring Flight line upload of flight plan data and download of aircraw maintenance data Advantages Inexpensive hardware mass produc+on Compares very favorable with wiring costs No licensing fees Disadvantages Crowding in the ISM bands Poten+al for crosstalk and interference Widespread knowledge of standards hacker target

23 Wireless Sensor Networks Wireless Applica+ons Short Range Unlicensed Bands Consumer Applica+ons Living Space Environmental Monitoring and Control Energy Management Remote Data Access Security Systems Automobile Service Diagnos+cs Personal Health Monitoring Health and Fitness Advantages Inexpensive hardware mass produc+on Compares very favorable with wiring costs No licensing fees Disadvantages Crowding in the ISM bands Poten+al for crosstalk and interference Widespread knowledge of standards hacker target

24 Wireless Sensor Networks Applica+on Requirements Robust Opera+on Tolerance of Interference/Interrup+on Quality of Service Coexistence WiFi/Bluetooth/ZigBee WiFi/Radar WiMax impact Fail Safe Modes Commissioning/Ease of Use Security/Privacy (Hippa)

25 Wireless Sensor Networks Industrial Machinery Vibra+on Monitoring Temperature Range: - 40 to +85 degrees C Bandwidth Requirement: 0 to 50 khz Security Requirement: Controlled environment within Factory minimum Coexistence Requirement: Plant WiFi system, Machinery EMI, Bluetooth Headset use, possible ZigBee Sensor systems for other applica+ons Robust Opera+on Requirement: Failure to report a deteriora+ng bearing or gearbox can result in physical damage to equipment and possible injury or death to workers

26 Wireless Sensor Networks Pharmaceu+cal Process Control Temperature Range: - 40 to +85 degrees C Bandwidth Requirement: 0 to 2 khz Security Requirement: Controlled environment within Factory minimum Coexistence Requirement: Plant WiFi system, Machinery EMI, Bluetooth Headset use, possible ZigBee Sensor systems for other applica+ons Robust Opera+on Requirement: Monitoring of the temperature, pressure, flow and other parameters of a bacterial growth vat. Control of flow, pressure and temperature. Timing requirements: 50 ms response to control changes

27 Wireless Sensor Systems AircraW Carrier Hangar Deck to Flight Deck Elevator Controls Temperature Range: - 40 to +85 degrees C Bandwidth Requirement: 0 to 5 khz Security Requirement: High must be impervious to interference from off shipboard. Must not be able to be monitored external to ship. Coexistence Requirement: WiFi system, Machinery EMI, Bluetooth Headset use, possible ZigBee Sensor systems for other applica+ons Robust Opera+on Requirement: Failure to perform will result in delay of delivery of aircraw to flight deck at a minimum. Worst case damage to aircraw or individuals

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31 Wireless Sensor Systems Other Applica+ons Automobile An+lock Braking Sensor Garbage Disposal Control Speed Zone Governors Loca+on Tracking Emergency Vehicle No+fica+on Payment Systems Promo+onal Tracking and Adver+sing