G - Physics – 01 – N
Patent
G - Physics
01
N
349/42, 349/44
G01N 29/04 (2006.01) G01M 17/02 (2006.01) G01N 29/11 (2006.01) G01N 29/40 (2006.01)
Patent
CA 1096033
ABSTRACT A system preferably a pulse echo reflection system, for residual tire life prediction by ultrasound includes; a transmit- ter transducer; means to provide pulses of electrical energy to the transmitter transducer, that converts the electrical pulses into pulses of ultrasonic vibrations and transmits them into an area of the ply-containing portion of the carcass of a tire, having a number of plies in the carcass, to be tested; clock means to control the frequency of the electrical pulses; a receiver transducer mounted relative to the transmitter transducer to re- ceive ultrasonic energy reflected by the tire; amplifier means connected to the receiver transducer to receive reflected ultra- sonic energy from different levels within that portion of the carcass of the tire, including reflected ultrasonic energy from plies of the carcass of the tires processing means having an input connected to the amplifier; and gate means responsive to the clock means to provide, after a delay following each electrical pulse, a time-gated signal from the output of the amplifier mean to the input of the processing means that, for each ultra- sonic pulse to the tire, includes only the amplified signals cor- responding to the reflected ultrasonic energy from a level adja- cent but outwardly of the outermost ply of that portion of the carcass of the tire to a level inwardly of at least the outermost ply of that portion of the carcass. The processing means is constructed to provide a signal indicative of ply degradation or separation based on the time-gated signal.
274019
Ash Leon
Gamache David L.
Johnson Richard N.
Kraska Irvin R.
Lichodziejewski Wieslaw L.
Gard Inc.
Hewitt Neville S.
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