초록 ▼

A system is disclosed for monitoring a structure and detecting disturbances and faults associated with such structure. The system includes an actuation device for mechanically exciting the structure, a sensing device for transducing vibrations experienced by the structure, and digital signal process

A system is disclosed for monitoring a structure and detecting disturbances and faults associated with such structure. The system includes an actuation device for mechanically exciting the structure, a sensing device for transducing vibrations experienced by the structure, and digital signal processing means for processing signals output by the sensing device. The response of the structure due to the mechanical excitation is analyzed and a baseline or normal response is determined. Vibrations of the structure are then analyzed and compared to the normal response of the structure and the nature of disturbances identified. Another aspect of the invention relates to a system for monitoring cracks, strains and the like and includes a continuity/strain sensor having a piezoelectric layer, and first and second low resistance layers. By suitably monitoring sensors in accordance with the invention, the magnitude as well as the location of a force can be determined.

대표청구항 ▼

An apparatus for monitoring and identifying disturbances to a structure comprising: a) first processing means for processing signals so as to monitor and identify disturbances to said structure; b) switch means controlled by said first processing means for gating a voltage signal; c) actuation means

An apparatus for monitoring and identifying disturbances to a structure comprising: a) first processing means for processing signals so as to monitor and identify disturbances to said structure; b) switch means controlled by said first processing means for gating a voltage signal; c) actuation means for applying a physical impulse to said structure upon receiving said voltage signal gated by said switch means, wherein the application of said physical impulse to said structure by said actuation means results in said structure experiencing an initial force of magnitude “F”in a first direction followed by a plurality of reactive forces in a direction opposite said first direction and having a total magnitude of “F”wherein said plurality of forces are applied to said structure at positions away from where said force of magnitude “F”was applied; d) sensor means for detecting the effects of said physical impulse on said structure and outputting an analog signal, said effects of said physical impulse indicative of said disturbances on said structure; e) second processing means for converting said analog signal into a digital signal; and f) means for providing said digital signal to said first processing means so as to monitor and identify disturbances to said structure.