UTM

UTM is a combination of a 4-channel pulser/receiver and a high-speed analog to digital converter on a single PCI board. The board generates an electrical pulse with the user-defined pulse voltage and pulse width through one of the 4 channels. The pulse is transmitted to an ultrasonic transducer, which then converts the electrical excitation pulse to an ultrasonic pulse that is propagated into either the tested material or couplant. The transducer also receives the echoes that are reflected from the interface and converts the ultrasonic pulse back into an electrical signal. The on-board receiver processes the signal with the user defined parameters, and the A/D converter converts analogsignals into digital data at a rate of 100 million samples per second. The digital data is transferred to the computer's RAM at about 10 MBper second. The resolution of the conversion is 9 bits, which can be anumber from 0 to 511. The memory depth can reach up to 256 kilo samples.

Other adjustable parameters include pulse voltage, pulse width, damping, internal relay for pulse/echo or through transmission switching, receiver gain, DC offset, low-pass filter,high-pass filter, rectifications, sampling rates, external trigger, buffer length and adjustable trigger delay. The pulsing channel and the receiving channel can also be set at the user's preference. And they do not have to be the same. A standard scope software is included with the board.

Options include digital inputs and outputs, an external clock input, a sync output, memory updates, an on-board hardware key module, a logarithmic amplifier, distance amplitude correction (DAC), additional two 14-bit analog to digital converters, and software development kits. Refer to PCIUT3100 all-in-one UT board and DT16B 16-channel pulser/receiver switching board for more channel solutions.