G - Physics – 01 – N
Patent
G - Physics
01
N
349/35, 349/44
G01N 29/00 (2006.01) G01M 17/02 (2006.01) G01N 29/04 (2006.01) G01N 29/11 (2006.01) G01N 29/40 (2006.01)
Patent
CA 1090913
ABSTRACT A residual tire life prediction system uses a clock to trigger a bang generator that provides pulses of electrical energy to a pulse-echo transducer. The transducer converts pulses of electrical energy to pulses of ultrasonic vibration. The transducer is located on the tread of a steel belted tire to transmit pulses of ultrasonic energy into the tire and to receive reflected ultrasonic energy from plies of the tire cas- ing. The transducer converts the reflected ultrasonic energy to provide bursts of electrical signals. The transducer is connected to a time varying gain control circuit that has its output connected via a full-wave rectifier to a first gate and to an input of a voltage level detector. The clock is also con- nected to a first time-delay circuit that is operative after a delay, subsequent to the pulse to the bang generator, to enable a second gate, connected to the output of the voltage level de- tector, that provides a signal, when it receives the signal based on the reflection from the outer steel belt, to a second time-delay circuit that provides an enable signal at its output after a predetermined delay for a predetermined period of time to the first gate to open it for passage of signals from the rectifier to a peak sensing device that provides an output sig- nal to a digital panel meter for display of the value of the maximum amplitude passing through the first gate.
276255
Kraska Irvin R.
Lichodziejewski Wieslaw L.
Stark John
Gard Inc.
Hewitt Neville S.
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