Re: Pitch-Catch in air

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Re: Pitch-Catch in air
Posted by: Linas Svilainis , E-mail: svilnis@rf.ktu.lt, on May 23, 1997 at 16:29:37:
In Reply to: Pitch-Catch in air posted by : John Bower on May 23, 1997 at 06:10:21:
: I am looking for equipment to do ultrasonic testing
(pitch-catch) in air. I will be working over a range
of 0 to 3 meters. I need millimeter resolution.
Does anyone know of sources for pulsers, transmitters,
receivers? I assume I need to work at 50 to 200 kHz
or so, but I am having trouble finding speakers and
microphones at these frequencies.
Dear John,
We have an acoustic sonar for location in air
(http://vingis.ktu.lt/ultrasound/sonar.htm).
It depends what you need - milimeter resolution
or accuracy?
We also have system for small distance
measurement which was developed for CRT mask
positioning during manufacturing process.
It has 10um accuracy but it will not cover
more than 30mm.
Could be made as spin-off of Sonar...
Linas Svilainis

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Comments:
: : I am looking for equipment to do ultrasonic testing : (pitch-catch) in air. I will be working over a range : of 0 to 3 meters. I need millimeter resolution. : Does anyone know of sources for pulsers, transmitters, : receivers? I assume I need to work at 50 to 200 kHz : or so, but I am having trouble finding speakers and : microphones at these frequencies. : Dear John, : We have an acoustic sonar for location in air : (http://vingis.ktu.lt/ultrasound/sonar.htm). : It depends what you need - milimeter resolution : or accuracy? : We also have system for small distance : measurement which was developed for CRT mask : positioning during manufacturing process. : It has 10um accuracy but it will not cover : more than 30mm. : Could be made as spin-off of Sonar... : Linas Svilainis

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