Multi-Channel Ultrasonic Pulser/Receiver and Phased Array Board
The PHA8 and PHA16 are multi-channel simultaneously firing pulser/receiver boards with square pulse pulsers. The PHA8T and PHA16T are multi-channel simultaneously firing pulser/receiver boards with tone burst pulsers. Each channel can be set to single transducer (pulse echo) mode or dual transducer (through transmission) mode. The pulse from each channel can be delayed slightly to create a phased array system.
PHA8(T) and PHA16(T) are slave boards and should work with the PCIAD850 or PCIAD1650 multi-channel simultaneous data acquisition boards. At each trigger event (software trigger or external trigger) the pulser/receiver channels will fire at user-specified delays and the data acquisition channels will simultaneously convert the analog signals to digital data with user selected post trigger delay, waveform length, gain, DC offset, low and high pass filters.
Multiple boards can be installed in the same computer for a data acquisition system with more than one hundred channels. With one board set as the master and remaining set to slave mode, all channels on the slave boards will start taking data upon receiving a trigger signal from the master board. The jitter between channels is less than 2 nanoseconds.
The optional distance amplitude gain (DAC) sets various gains at different times during the acquisition. This is very useful for the inspections of materials thicker than 1 inch.
Up to 2 encoder counters can be added to the board to enable position-based data acquisition and generate precise ultrasonic images.
Users can develop their own software with the provided Windows dynamic libraries for Microsoft C/C++, Visual Basic, and LabVIEW. See the user's guide for PCIAD850 or PCIAD1650 for more details.
Applications include flaw mapping, thickness mapping, material evaluation and characterization, rail road inspections and pipeline girth weld inspections. They also can be used for EMAT and guide wave inspections.