Method and apparatus for measuring depth of crack for reinforced

Details Method and apparatus for measuring depth of crack for reinforced Method and apparatus for measuring depth of crack for reinforced

1995-10-27

1997-10-07

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73602, 73597, 73624, G01N 2904

Patent

active

056750854

ABSTRACT:
By arranging a pair of an ultrasonic wave transmitting sensor and an ultrasonic wave receiving sensor in opposition across a crack in a reinforced concrete construction. An ultrasonic wave is transmitted from the ultrasonic wave transmitting sensor at a first position. A reflected wave is then received by the ultrasonic wave receiving sensor at the first position. Also, the ultrasonic wave is transmitted from the ultrasonic wave transmitting sensor at a second position. A reflected wave is then received by the ultrasonic wave receiving sensor at the second position. The received waves at two positions are provided mutual phase shift for a predetermined period and summed in reversed phase for deriving a rise time of the wave reflected from the crack. By this, even when reinforcement is arranged in the concrete, the noise component superimposed on the received wave due to presence of the reinforcement can be eliminated to permit high precision measurement of the depth of the crack irrespective of the presence of the reinforcement at high density.

REFERENCES:
patent: 3592052 (1971-07-01), Giacomo et al.
patent: 4052889 (1977-10-01), Mucciarda et al.
patent: 4522064 (1985-06-01), McMillan
patent: 4570487 (1986-02-01), Gruber
patent: 4640132 (1987-02-01), Flora et al.
patent: 4658649 (1987-04-01), Brook
patent: 4953405 (1990-09-01), Hara et al.
patent: 5431053 (1995-07-01), Fink
patent: 5492012 (1996-02-01), Terhune

Affiliated with

Also associated with

Rating

Method and apparatus for measuring depth of crack for reinforced does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for measuring depth of crack for reinforced, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring depth of crack for reinforced will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2359030