Method for pulse offset calibration in time of flight...

Details Method for pulse offset calibration in time of flight... Method for pulse offset calibration in time of flight...

2005-03-08

2005-03-08

Lobo, Ian J. (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Testing, monitoring, or calibrating

C367S099000, C367S908000, C073S29000R

Reexamination Certificate

active

06865137

ABSTRACT:
A pulse offset calibration method for a pulse-echo level measurement system. The pulse-echo level measurement system includes a transducer for transmitting calibration acoustic pulses and receiving echo pulses. A receiver converts the echo pulses into corresponding pulse profile signals having a leading edge. A static delay interval is defined on the leading edge corresponding to the time interval between the reception of the echo pulse and the response by the receiver. A dynamic delay interval is defined on the leading edge corresponding to the time response characteristics of the transducer and the receiver. The static delay interval and the dynamic delay interval are summed to determine the offset time interval for the echo pulse. The offset time interval is subtracted from the measurements to provide the true duration for the time of flight.

REFERENCES:
patent: 5319974 (1994-06-01), Lenz et al.
patent: 5755136 (1998-05-01), Getman et al.

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