Crossbow_S01.ppt

543
-1

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
543
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
4
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Crossbow_S01.ppt

  1. 1. Applying Wireless I/O Controller To NeSSI May 7, 2001 Mike Horton President & CEO Crossbow Technology, Inc.
  2. 2. Background / Outline <ul><li>Crossbow: Five years in the digital sensor subsystem business </li></ul><ul><li>New CrossNet Wireless sensor / actuator architecture </li></ul><ul><li>Sensor / Actuator “Node” uses open (Bluetooth) standard </li></ul><ul><li>“ Smart I/O (SI/O)” devices provide standards-based Plug-and-Play I/F to almost any sensor </li></ul>
  3. 3. Wireless Technologies Various 100mW 1mw/100mw Power Various Secure Very secure Robustness Various 100m 10m/100m Range 288kb/sec 11Mb/sec 720kb/sec Datarate FM;FH;DS DSSS FHSS, 1600/sec Modulation 49MHz, 900 MHz, 2.4GHz 2.4GHz 2.4GHz Frequency Various Proxim; Aironet; Breezecom Ericsson, CSR, Motorola Manufacturers Proprietary 802.11b Bluetooth
  4. 4. Basic Wireless Operation <ul><li>Inquiry – returns Bluetooth addresses of all devices within range </li></ul><ul><li>Establish synchronized link—master/slave </li></ul><ul><li>Establish a piconet – up to 7 slave devices in synchronized communication </li></ul><ul><li>Establish a larger or more complex network </li></ul><ul><ul><li>Unlimited additional slave devices “parked” </li></ul></ul><ul><ul><li>Master switches from piconet-piconet </li></ul></ul><ul><li>Hopping 1500/sec => effective latency O/M milliseconds (10s of milliseconds for larger networks) </li></ul>
  5. 5. Crossbow Node Architecture 300’ or 30’ Range ARM7 uP A/D 16 bit Mux SENSOR/ACTUATOR SENSOR/ACTUATOR SENSOR/ACTUATOR SENSOR/ACTUATOR Bluetooth Radio Chip Baseband Controller SRAM for Data SIO serial comm Flash RAM SIO +5.00 Supply Power 5V DC Temp Sensor AA B a t t e r y DC-DC +3.5 & 5V Voltage Converter BATTERY PACK (OPTIONAL) Radio Module Optional Power Amp AA B a t t e r y AA B a t t e r y AA B a t t e r y
  6. 6. Plug and Play Sensors / Actuators <ul><li>“ Smart” Sensor I/O (SI/O): </li></ul><ul><ul><li>Make all sensors electrically consistent and smart </li></ul></ul><ul><ul><li>Each sensor used interchangeably with CrossNet Bluetooth Wireless node </li></ul></ul><ul><li>Normalize raw analog signal for node input </li></ul><ul><ul><li>4-20mA, DC Voltage, RTD, Thermocouple </li></ul></ul><ul><li>Store Electronic Data Sheet and Calibration Data for sensor </li></ul><ul><ul><li>Keep this info with the sensor in the SI/O </li></ul></ul><ul><ul><li>Info includes: physical parameters, measurement range, desired engineering units, calibration information, user defined fields (sensor name, etc.) </li></ul></ul><ul><ul><li>Based on IEEE 1451.2 TEDS/SCEDS standards </li></ul></ul><ul><ul><li>Sensor can be added to measurement setup quickly and reliably </li></ul></ul>
  7. 7. SI/O Architecture NODE SENSOR/ACTUATOR SENSOR/ACTUATOR SENSOR/ACTUATOR SENSOR/ACTUATOR SIO Programmable Signal Conditioning Output (0 - 5V) uP w/ flash memory TEDS Serial Communication SENSOR Sensor Excitation Sensor Output (low level) Terminal block for user to attach sensor Inexpensive cable, high level analog sensor signals
  8. 8. Typical Wireless I/O Application Level Sensor T/C Sensor Pressure Sensor Flow Sensor
  9. 9. Wired S/A; Wireless IOC Sensor Manager (I/O Controller) Signal In/Out to AC V T P A
  10. 10. Wireless S/A; Wireless IOC Sensor Manager (I/O Controller) P A V T SM
  11. 11. CrossNet SoftSens Software <ul><li>Provide data to the user on whatever platform is desired (PC, laptop, PDA, web, etc.) </li></ul><ul><li>Make data accessible to a variety of data acquisition and analysis packages (LabView, C++, Excel, Visual Basic, etc.) </li></ul><ul><li>Manages all Bluetooth node operations (Inquiry, Connect, Piconet) </li></ul><ul><li>Track nodes as they come into and out of radio range. </li></ul><ul><li>Interrogate nodes for configuration and sensor information </li></ul><ul><li>Transfer data. </li></ul><ul><li>Configure operating modes and parameters. </li></ul><ul><li>Establish common time stamp for all Nodes. </li></ul><ul><li>Upload new Node and SIO code over radio. </li></ul><ul><li>Allow SIOs to be user configured for TEDS. </li></ul>
  12. 12. SI/O Architecture NODE SENSOR/ACTUATOR SENSOR/ACTUATOR SENSOR/ACTUATOR SENSOR/ACTUATOR SIO Programmable Signal Conditioning Output (0 - 5V) uP w/ flash memory TEDS Serial Communication SENSOR Sensor Excitation Sensor Output (low level) Terminal block for user to attach sensor Inexpensive cable, high level analog sensor signals
  13. 13. Single Channel Product <ul><li>Combine radio, processor, A/D,SIO, Transducer Electronic Data Sheet, software for small unit dedicated to single sensor </li></ul>Integrated single channel node/SIO Bluetooth Radio Chip Baseband Controller uP A/D Signal Cond. SENSOR OR ACTUATOR
  14. 14. Wireless S/A; Wireless IOC Sensor Manager (I/O Controller) P A V T SM
  15. 15. Wired S/A; Wireless IOC Sensor Manager (I/O Controller) Signal In/Out to AC V T P A
  16. 16. Summary <ul><li>Wireless approach seems feasible </li></ul><ul><li>Two basic implementation options </li></ul><ul><li>Most flexible is complete “wireless smart-sensor add-on” for each sensor and actuator and optional wireless I/O controller </li></ul><ul><li>Need to review economics </li></ul><ul><li>Good first step: </li></ul><ul><ul><li>SI/O on each sensor / actuator, wired to wireless I/O controller </li></ul></ul>
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×