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Paul K. Dixon and Timothy D. Usher Department of Physics California State University San Bernardino The Development of NI-ELVIS.

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Presentation on theme: "Paul K. Dixon and Timothy D. Usher Department of Physics California State University San Bernardino The Development of NI-ELVIS."— Presentation transcript:

1 Paul K. Dixon and Timothy D. Usher Department of Physics California State University San Bernardino The Development of NI-ELVIS

2 I. Past: Applied Physics Instruction at CSUSB and our “Integrated” Student Station II. Present: The Development and Maturation of NI-ELVIS Outline Introduction

3  1994: an NSF ILI grant to equip the electronics laboratory using LabVIEW and fully-interfaced equipment  1995: Physics 150 – Introductory Analog Electronics at the freshman level (before calculus, before intro physics) Ohms Law to Lock-in Amplifiers in 10 weeks  1996: Physics 350 – Computer-based Data Acquisition and Control at the junior level LabVIEW, GPIB, DAQ, Experiment Interfacing, Control Theory, ITR Filtering, PID, State Machines  1997: Physics 352 – Advanced Electronics at the senior level Linear Response Theory, Integral Transforms, Analog and Digital Communication Theory, Noise Analysis, ORCAD PSPICE Applied Physics Instruction at CSUSB - An Overview I. Past

4  Instructor station/server with LCD projector  Windows 2000 peer-to-peer network, no outside line  12 Student Stations The Student Station Hardware I. Past 850 MHz Pent III 17” Display LabVIEW PCI DAQ Protection Module PCI GPIB HP Scope HP FG HP DMM Elenco Trainer

5  Simple launcher for tutorials and instruments  LabVIEW The Integrated Software Environment for Freshman Electronics I. Past

6  GPIB DMM Function Generator Scope  DAQ Scope Arbitrary FG Voltmeter Counter Pulse Generator Digital I/O  Amalgam Bode – GPIB FG & GPIB Scope Two-point IV Curve – GPIB DMM & DAQ Arbitrary FG Virtual and Amalgam Instruments for Freshman Electronics I. Past

7 The power boosting circuit Junior LV Project – A PID Controller I. Past The “Bug” A standard project in the 7th week  GPIB Instrument Driver, DAQ Analog IO, Feedback Control Theory  Control References, VI Server, etc.

8 Final Project  Circular Buffered Analog In, Digital IO, State Machines Junior LV Project - A Seismograph I. Past Seismometer - a weighted speaker Impulsive Tester - a sprinkler solenoid

9 Junior LV Project - Phototrope I. Past Final Project  Buffered Analog In, Inline IIR Digital Filtering, Digital IO, State Machines Angled binocular photoresistive eyes, photogate “OWL neck” sensor, and a bi-directional two-speed baby-swing motor drive system

10  Fixed Breadboard Wear and Tear Dedicated circuits – makes concurrent sections impossible Wiring must be done in lab Instructor continually building demo circuits!  Standard DAQ Limited power in analog out  GPIB Instruments Difficult to integrate with DAQ, chunky communication  The Solution  Integrate the DAQ interface and the trainer into a single unit with a removable breadboard and protection module  Add the functionality of the GPIB Instruments into the integrated trainer The Limitations of our Past Approach I. Past

11  1994 : Designed and built the initial protection modules for our precious AT-MIO-16 cards  1998 : Designed and tested the Integrated Electronics Design Station (IEDS) communication module at a student station  : Designed and built IEDS and showed it to NI  Summer 2001: Designed and built the Universal Laboratory Instructional Station (ULIS) feasibility prototype in collaboration with NI (Steven Romero, Anne Goshorn, Jeff Hall)  Fall 2001 to the Present : Happily watched NI design and build the Educational Laboratory Virtual Instrument Suite (ELVIS) The Development and Maturation of NI - ELVIS - An Overview II. Present

12   Fully Functional  Major Power – 30 Watts!  All of the capability through a 68 pin E-series card and about 70 chips IEDS: The Integrated Electronics Design Station - The Functional Prototype II. Present

13 ULIS: The Universal Laboratory Interfacing System - The Feasibility Prototype II. Present ULIS Function Generator ULIS Impedance Meter  Summer 2001 – a blur!  The NI Design Team: Steven Romero, Anne Goshorn, Jeff Hall

14  Fall 2001 – present  Any 68-pin E-series DAQ card  DMM and Scope on both breadboard and front panel  External power block ~ 18 Watts to breadboard  Finally, a main power switch! NI - ELVIS: The Educational Laboratory Virtual Instrument Suite II. Present

15 The Breadboard 392 undedicated tie points Removable – 3 ring binder BNC, Banana, 9-pin Dsub Power LEDS Logic LEDS NI - ELVIS: Hardware Features II. Present The Protection Module High current lines fused Low current lines – sacrificial inline resistors Power and DAQ interlock Replaceable in under a minute

16 NI - ELVIS: The Current Instrument Software II. Present

17  Green – NI reworked and polished  Blue – My “hacked” examples in the process of being reworked by NI  Black  Black – capabilities built into the hardware, on the “to-do” list  Addressable Digital I/O – allows for 16 bytes of write and 16 bytes of read to plug-in approximately 250 Hz  ELVIS can read the plug-in board ID (0-255) allowing for a variety of dedicated boards with linked software NI - ELVIS: Capabilities and Future Instrument Software II. Present


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