Patent ID: 6598485
Filing Date: 2003-07-29
Classification: G01N

Abstract:
An apparatus for detecting quality of concrete structures, comprising:a conductive impact device including a connecting section with a predetermined length, said connecting section having one end formed with an impacting end and the other end formed with a knob; a sensing film including a conductive film and a non-conductive plastic film stuck at a point to be impacted; a receiver for receiving signals introduced by longitudinal waves, transverse waves and Raleigh's waves; an operation device including an analog-to-digital interface card for receiving signals from a first wire connected to said connecting section, a second wire connected to said receiver, and a third wire connected to said conductive film for calculating the depth of a crack; and an auxiliary circuit including a resistant connected between said first and third wires, and an electric power source connected in serial with said third wire; wherein when said conductive impact device is in contact with said conductive film, said first wire is connected with said third wire through said connecting section to form a closed circuit from an open circuit.