VIBRATION BED TO EXAMINE AND CALIBRATE SEISMIC PROSPECTING EQUIPMENT Russian patent published in 2001 - IPC

FIELD: calibration of seismic prospecting equipment. SUBSTANCE: vibration bed includes springy member in the form of bellows forming closed volume jointly with table and base that houses piezoelectric exciter of mechanical vibrations coupled to table and base, control acceleration transducer put on table and additional control acoustic transducer mounted on base. Hole communicating closed volume with atmosphere is made in table. Effective section of hole is chosen from specified condition. Location member made of elastic material and ensuring interaction with sensitive element of control acoustic transducer is positioned on outside of table, on hole. EFFECT: expanded application field, range of operational frequencies and diminished effect of external noises. 1 dwg