| 摘要 |
The suppressor is used in a machine (1) to separate it from the base (2). The force sensor comprises a piezoelectric layer (3) between a first metal sheet (5), connected to an amplifier, and a second sheet which also screens the signal. Further screening is provided by a box (9) around the amplifier and another metal sheet (4) separated from the first by an insulator (7). The amplified signal passes to an A-to-D converter (10) and the microprocessor (11) which monitors the phase, frequency and amplitude and produces the cancelling signal to a certain threshold amplitude. A D-to-A converter (13) and amplifier (14) send the cancelling signal to an impedance matching transformer (15). The transformer output is connected to a plate between two piezoelectric sheets (20, 21) in inverse polarisation and the entire section is completely screened (16, 18, 19). USE - Naval vibrations, pointing and aiming equipment, passenger transport.
|
