Re: Ultrasonic Distance Measuring System

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Re: Ultrasonic Distance Measuring System
Posted by: Philippe Rubbers (PID_168), E-mail: philippe.rubbers@eskom.co.za, on October 19, 2000 at 12:28 :
In Reply to: Re: Ultrasonic Distance Measuring System posted by : Dipl.-Ing. Martin Heinz on October 17, 2000 at 16:18:
Hi There
If you are looking for low cost high performance A/D's try gage-applied.com
They have PC based A/D cards with plenty of drivers (for Labview etc) at very reasonable prices.
If you are mapping UT data, a simple option would
be an arm with 2 joints (with pots) plugged into your games port. Using trig, you can determine the position
of the end of the arm, and use this as x,y data for
the UT signal, from which C/B scans can be generated.
No point in using fancy lasers/acoustics to determine
where your probe is. My collegue put an arm together
in 2 hours from scratch to working product, with a
resolution and repeatability of 0.8mm.

: Hello Artan...
: : The way to interface an Ultrasonic signal from a digital oscilliscope to a CPU is with a mapping processor. If you are using an analog oscilliscope you need a digital pre-processor to convert the signal before mapping. Both components are pretty expensive.
:
: Hello Artan,
: a very simple other possibility is to use the LabVIEWŽ -software (National Instruments). National Instruments offers a large range of A/D data acquisition cards for PC, and the LabVIEWŽ -software is a graphical programming language, with which you can easily setup each measurement instrument you can imagine.

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: Hi There : If you are looking for low cost high performance A/D's try gage-applied.com : They have PC based A/D cards with plenty of drivers (for Labview etc) at very reasonable prices. : If you are mapping UT data, a simple option would : be an arm with 2 joints (with pots) plugged into your games port. Using trig, you can determine the position : of the end of the arm, and use this as x,y data for : the UT signal, from which C/B scans can be generated. : No point in using fancy lasers/acoustics to determine : where your probe is. My collegue put an arm together : in 2 hours from scratch to working product, with a : resolution and repeatability of 0.8mm. : : : Hello Artan... : : : The way to interface an Ultrasonic signal from a digital oscilliscope to a CPU is with a mapping processor. If you are using an analog oscilliscope you need a digital pre-processor to convert the signal before mapping. Both components are pretty expensive. : : : : Hello Artan, : : a very simple other possibility is to use the LabVIEWŽ -software (National Instruments). National Instruments offers a large range of A/D data acquisition cards for PC, and the LabVIEWŽ -software is a graphical programming language, with which you can easily setup each measurement instrument you can imagine.

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