05-29-2018 01:00 PM
Does anyone know how to work with the ultrasonic sensor "Ultra-Trak 750"? What kind of cDAQ module I can use to get signal from this sensor (it has output 4-20mA) and how to treat the signal?
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05-30-2018 02:21 AM - edited 05-30-2018 02:30 AM
A link to the datasheet is always kind and helpful 😉
After a little RTFM😧
This sensor detects 40 kHz and outputs a industry standard 20mA current signal proportional to the detected amplitude. So look for DAQ modul with 20mA input .. 50kSPS is fine and you will need a external powersupply. I would look at the 9203 or 9218 ...
05-30-2018 02:29 AM
I have this documentation. I don't understand what kind of signal I have to read, how to treat it after. Another question is Sampling Rate: can I use ni-9201 module or I need NI-9223 (with 1MS/s/ch)?
05-30-2018 02:44 AM - edited 05-30-2018 02:44 AM
Updated my first post..
You need a current input (or a (250-to 500Ohm resistor with a voltage input )
What do want to measure/detect (what do you want to do with that sensor) ?
The sensor will detect the presence of a 40 kHz vibration and output a amplitude proportional current.
The coarse max output frequency is 20 kHz (assuming one periode is needed for 40 kHz detection, I expect the demodulator following lowpass is lower...) so 50 kSPS should be fine
05-30-2018 03:15 AM
now I understand