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US 4,309,610 AGranted
Method of determining the location, orientation and pattern of reinforcing members in reinforced concrete
AssigneeHochtief Aktiengesellschaft vorm. Gebruder Helfmann
InventorBernd Hillemeier
Life of this patent
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Abstract
A method of determining location and orientation of metallic reinforcing members in reinforced concrete whereby the members are heated inductively, e.g. by a spiral coil lying in a plane parallel to the plane of the reinforced concrete slab, and the heating of the members is detected by thermally sensitive means, such as a camera (e.g. thermovision), film or paper responsive to infrared radiation. The heat pattern represents the pattern of reinforcement.
Claims6
A method of detecting the disposition of metallic reinforcing members in a structure of reinforced concrete, comprising the steps of:
- (a) inductively heating said members to a temperature above the ambient temperature;
- and
- (b) detecting the thermal radiation pattern at said surface whereby heated regions thereof correspond to respective reinforcing members.
Dependencies are inferred from the claim text.