 This is the Eddy Current instrumentation package
that was developed using the Tektronix mainframe with power supply. The three identical
instruments on the right are tuned probe eddy current modules for the detection of cracks
in the M509 base plug. The single module on the left is the Tektronix display and time
base. The module to it's right is the multiplexer for the three eddy current units. This
arrangement provided a better than 4:1 noise ratio for the .005" x .250" crack
in the thread undercut area, an area very difficult to reach. With special probes made by QMI® very satisfactory results
were obtained. |
QCS has custom made the following modules.
The ultrasonic scanned distance gain control units are used to correct the gain as a function of the scanner position along the length of a part. The gain can be changed by a factor of 0-20dB as a function of the distance. The module accepts encoder inputs and the scanned distance can be divided into a maximum of 100 increments of different settings. In this fashion one transducer could do the work that usually three of four transducers along with three or four more UT channels would do in a mediocre fashion because a compromise on the gain setting would have to be made. |
