ATE 02 - 1 / 31

Lezione 3

i sistemi automatici di misurazione

-gli ATE

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nella parte 1 ...

I sistemi modulari su bus standard

• IEEE Std 488 - GPIB - HPIB(1975)

• IEEE Std 1155 - VXI(1988)

• PXI(1997)

• LXI(2004)

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nella parte 1 ...

I sistemi automatici di misurazione

• ATE e “in-circuit test” ( ICT )

• Struttura dell’ATE

• Switch matrix

• Fixture e “letto di aghi”

• Guarding

ATE 02 - 4 / 31

nella parte 2 ...

Lo standard IEEE 488

• Livello fisico

• Handshake

• Addressing, Command e

Data Mode

• Device Dependent Command

• Software

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parte 3

SW per ATE

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Programmazione del controller

• Linguaggi dedicati (‘80)

• Linguaggi grafici– NI LabVIEW – HP VEE

• Librerie per linguaggi di

programmazione ad oggetti– NI Measurement Studio for Visual Basic,

Visual C#, Visual C++, .NET

• Ambienti di sviluppo e generazione per

linguaggi di programmazione imperativi– NI LabWindows/CVI for ANSI C

ATE 02 - 7 / 31

LabVIEW: Lab Virtual Instruments Electronic Workbench

ATE 02 - 8 / 31

Programmazione in G

Esempio 01.vi

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LabVIEW: Lab Virtual Instruments Electronic Workbench

2000 LabVIEW per Linux

1995 LabVIEW

1994-10 LabVIEW 3 per HP-UX

1993-7 LabVIEW 3 (Mac, Windows, Solaris)

1990-10 LabVIEW 2 per Sun Solaris

1990-9 LabVIEW 2 per MS Windows

1990-4 Registrazione brevetto LabVIEW

1990-1 LabVIEW 2 per Macintosh

1986-4 Lancio sul mercato di LabVIEW 1 per Macintosh

1983 Inizio sviluppo sw grafico per velocizzare l’allestimento, il test e la modifica di “banchi con strumenti elettronici virtuali”

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… ed il bombardiere B1-B

il Consorzio VXIbus ...

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Linguaggi grafici

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Linguaggi grafici

IEEE 488HP- IB

IEEE 1155VXI

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Linguaggi grafici o no?

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Programmazione del controller

• Linguaggi dedicati (‘80)

• Linguaggi grafici– NI LabVIEW – HP VEE

• Librerie per linguaggi di

programmazione ad oggetti– NI Measurement Studio for Visual Basic,

Visual C#, Visual C++, .NET

• Ambienti di sviluppo e generazione per

linguaggi di programmazione imperativi– NI LabWindows/CVI for ANSI C

ATE 02 - 15 / 31

NI Measurement Studio for Visual Basic,Visual C#, Visual C++, .NET

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MS Visual Basic

ATE 02 - 17 / 31

MS Visual Basic

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MS VB TestBox

ATE 02 - 19 / 31

MS VB CommandButton

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MS VB Code

ATE 02 - 21 / 31

NI Measurement Studio for VB

NI MS Knob

NI MS Graph

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Interact with Data

ATE 02 - 23 / 31

Linguaggi grafici o no?

ATE 02 - 24 / 31

Programmazione del controller

• Linguaggi dedicati (‘80)

• Linguaggi grafici– NI LabVIEW – HP VEE

• Librerie per linguaggi di

programmazione ad oggetti– NI Measurement Studio for Visual Basic,

Visual C#, Visual C++, .NET

• Ambienti di sviluppo e generazione per

linguaggi di programmazione imperativi– NI LabWindows/CVI for ANSI C

ATE 02 - 25 / 31

LabWindows/CVI 2009

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NI LabWindows / CVI

ATE 02 - 27 / 31

What is LabWindows/CVI?

The proven LabWindows/CVI environment features code generation tools and prototyping utilities for fast and easy C code development.

It offers a unique, interactive ANSI C approach that delivers access to the full power of C with the ease of use of Visual Basic. Because LabWindows/CVI is a programming environment for developing measurement applications, it includes a large set of run-time libraries for instrument control, data acquisition, analysis, and user interface.

LabWindows/CVI also contains many features that make developing measurement applications much easier than developing in traditional C environments.

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NI LabWindows/CVI

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NI LabWindows/CVI

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ATE 02 - 31 / 31

Is VXI dead?

VXI continues to get investment for applications that require the high-speed and high-density benefits this architecture delivers.

We’ve found VXI works well in aerospace-defense, automotive, high-speed digital, and telecom applications where tight inter-module linkages and high channel count are critical. But as noted above, this capability comes at a steep price premium.

For general-purpose instruments, and in small to medium size applications, most customers prefer to use rack & stack because they offer a manual user interface and display, they are lower cost for equivalent capability, and they offer the flexibility to use the same instrument on both the bench and in the rack.