Point pressure type acquisition device

The utility model relates to a point pressure type acquisition device, and belongs to the field of defect detection equipment in a concrete structure. A plurality of collectors are arranged in the collection device; the vibration exciter and the plurality of collectors are geometrically arranged to form a'small arrangement 'detection device, when the vibration exciter generates elastic waves through the surface of a transient impact structure, each collector receives elastic waves propagating along a medium, homologous multi-channel elastic wave data are formed through each excitation, and a multi-source multi-channel elastic wave data volume can be obtained. Compared with an ultrasonic opposite measurement method, a plurality of detection surfaces are not needed; compared with an ultrasonic flat measurement method, the inner defect position can be determined; compared with a geological radar method, the method is not affected by internal steel bars and other metal objects; compared with a traditional impact