LOW-FREQUENCY VIBRATION BED Russian patent published in 1995 - IPC

FIELD: testing equipment. SUBSTANCE: invention deals with testing of seismometric equipment. Low-frequency vibration bed has mobile system coupled through restoring hinges to base with the aid of two supports, two vibration exciters, movement transducer, first comparator, second amplifier and second comparator connected in series, third vibration exciter. Symmetry axes of second and third vibration exciters are displaced with reference to axis passing through centers of restoring hinges mounted on mobile system. It also includes clinometer so installed on mobile system that its measuring axis is located in plane of horizon perpendicular to axis of reproduced vibration, programmed amplifier, second comparator, low-frequency filter, communication unit, decoder. EFFECT: enhanced precision of reproduced vibration (error is reduced up to 1%). 1 dwg