| 摘要 |
Apparatus (10) for measuring the physical properties of a tube (T) or similar object using an ultrasonic testing method. A pulse generator (16) generates an electrical pulse having a predetermined set of characteristics. Transducers (20a,20b) simultaneously convert the pulse to an ultrasonic waveform (W) and propagate the waveform at the tube from at least two different directions. The transducers then convert echoes (E1-E3) from the tube into electrical response pulses. Another transducer (24a) propagates a similar waveform at a reference object (B) and converts an echo from the reference object into a reference electrical response pulse. The reference response pulse is then combined with each of the other response pulses. Separate receivers receive the respective combined response pulses and converts them to digital data stored in a memory. A multi-channel processor (36) simultaneously, separately reconstructs each combined waveform and determines from each separate reconstruction a value representing a physical characteristic of the tube. Processing first involves performing a "real time" evaluation the combined waveform to determine if it meets threshold criteria. If so, the multi-channel processor performs linear interpolation and finite impulse responses on the digital data to precisely measure time of flight (TOF) values. <IMAGE> |
