A screening system for screening material, in particular for screening mineral rock, the system having a screen box, with two outer side walls. At least two vibration systems are arranged on each of the two side walls to excite vibration. The two side walls each have at least two vibration nodes in accordance with a bending mode, at least two crossmembers, which connect the two side walls to one another, at least one screen deck, which is supported on the at least two crossmembers. The two vibration systems on each of the side walls are arranged such that each vibration system is arranged in the region of a vibration node of the respective side wall. The disclosure also relates to a method for screening material to be screened, in particular for screening mineral rock, via a screening system of the aforementioned type.

A system includes a first transducer configured as an actuator. The first transducer is in communication with a surface of a structure. A second transducer is configured as a sensor. The second transducer is in communication with the surface. A third transducer is configured as a sensor. The third transducer is in communication with the surface and separated from the second transduce by an area. A digitizing unit receives signals from the second transducer and the third transducer. The digitizing unit communicates a plurality of frequency signals for the first transducer. A computing unit communicates the plurality of frequency signals to the digitizing unit, receives digitized signals from the digitizing unit, and calculates a Frequency Response Function from the digitized signals. Changes to the Frequency Response Function indicate a change to physical properties of the structure.

A system includes a first transducer configured as an actuator. The first transducer is in communication with a surface of a structure. A second transducer is configured as a sensor. The second transducer is in communication with the surface. A third transducer is configured as a sensor. The third transducer is in communication with the surface and separated from the second transduce by an area. A digitizing unit receives signals from the second transducer and the third transducer. The digitizing unit communicates a plurality of frequency signals for the first transducer. A computing unit communicates the plurality of frequency signals to the digitizing unit, receives digitized signals from the digitizing unit, and calculates a Frequency Response Function from the digitized signals. Changes to the Frequency Response Function indicate a change to physical properties of the structure.

A coupler system for a vibratory system comprising an eccentric system comprising at least one transfer gear operatively connected to at least upper and lower eccentric members, the coupler system comprising a coupler housing defining a coupler axis, at least one drive rack supported for linear movement within the coupler housing, a coupler drive system for causing linear movement of the at least one drive rack within the coupler housing, at least one coupler gear adapted to engage the at least one transfer gear, and at least one pinion assembly operatively connected between the at least one drive rack and the at least one coupler gear. Linear movement of the at least one drive rack causes rotation of the at least one coupler gear around the coupler axis to alter an angular relationship of the upper and lower eccentric members.

A coupler system for a vibratory system comprising an eccentric system comprising at least one transfer gear operatively connected to at least upper and lower eccentric members, the coupler system comprising a coupler housing defining a coupler axis, at least one drive rack supported for linear movement within the coupler housing, a coupler drive system for causing linear movement of the at least one drive rack within the coupler housing, at least one coupler gear adapted to engage the at least one transfer gear, and at least one pinion assembly operatively connected between the at least one drive rack and the at least one coupler gear. Linear movement of the at least one drive rack causes rotation of the at least one coupler gear around the coupler axis to alter an angular relationship of the upper and lower eccentric members.