Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1975-07-02
1976-08-24
Queisser, Richard C.
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73 67, G01N 2900
Patent
active
039759393
ABSTRACT:
Methods of and apparatus for simulating ultrasonic pulse echoes are used to test and calibrate ultrasonic flaw detectors by simulating a train of radio frequency pulses, having a pulse repetition frequency which is indicative of both the speed of sound in a material under test and the thickness of that material. This is accomplished by generating a train of d.c. pulses having a pulse repetition frequency, which is directly proportional to and, which is a multiple of the speed of sound of the material The pulse repetition frequency is also inversely proportional to the thickness of the material. The d.c. pulses are used to drive a radio frequency pulse generator and a pulse modulator. The outputs of the radio frequency generator and pulse modulator are then combined to produce a signal having an amplitude envelope, which simulates a series of ultrasonic pulse echoes.
REFERENCES:
patent: 2796756 (1957-06-01), Yates et al.
patent: 2966057 (1960-12-01), Heller
Rhodes, Environmental Quarterly, "Piezoelectric Transducer Calibration Simulation Method," 1962 pp. 1-4.
Kreitman Stephen A.
Queisser Richard C.
LandOfFree
Methods of and apparatus for simulating ultrasonic pulse echoes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods of and apparatus for simulating ultrasonic pulse echoes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods of and apparatus for simulating ultrasonic pulse echoes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-771218