Signal acquisition device for nondestructive testing of quality of multi-defect long anchor cable

The utility model discloses a multidirectional signal acquisition device suitable for nondestructive testing of quality of a multi-defect long anchor cable, which comprises an excitation hammer, a plurality of anchor cable sensors, a data acquisition instrument, a power supply and a computer, the signal output end of the anchor cable sensor is connected with the signal input end of the data acquisition instrument, the signal output end of the data acquisition instrument is connected with the computer, and the power supply is connected with the data acquisition instrument; the exciting hammer comprises a hammer head and a hammer body, the hammer head is a hemispherical steel ball and is fixed at the front end of the hammer body, and the exciting hammer is used for knocking the exposed end of the anchor cable steel strand and exciting to generate vibration signals consistent in waveform. According to the utility model, a multi-azimuth superposition type acquisition technology is adopted, weak signals can be eff