Sonar and calibration utilizing non-linear acoustic reradiation

Details Sonar and calibration utilizing non-linear acoustic reradiation Sonar and calibration utilizing non-linear acoustic reradiation

1994-03-14

1995-12-05

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Testing, monitoring, or calibrating

73 1DV, H04B 1300

Patent

active

054735785

ABSTRACT:
An acoustic beam having at least one preset frequency is generated and dited towards a preselected non-linear acoustic reradiator. The reradiator returns acoustic waves having a different frequency. These reradiated waves are monitored, and a preselected parameter is detected in response to the returned reradiated acoustic waves. In a first embodiment, the preset frequency acoustic beam is generated at one or more frequencies and radiated by at least one projector. Upon incidence of the preset frequency acoustic beam, a preselected reradiator generates acoustic waves having a different frequency. The reradiated acoustic waves are used to calibrate a hydrophone. The reradiated acoustic waves can be controlled by the acoustic projector without a wire link.
In another embodiment, the non-linear reradiation is caused by the action of a projected beam on cavitation generated by a vessel remote from the projector. The action of the acoustic beam upon cavitation at the propeller or other structure generates acoustic waves having a different frequency. Undesirable reverberation is largely avoided since the receiver is adjusted to receive only the new frequencies generated by the cavitation.

REFERENCES:
patent: 2411537 (1946-11-01), Goodale, Jr.
patent: 3882444 (1975-05-01), Robertson
patent: 3896411 (1975-07-01), Mackey et al.
patent: 3909772 (1975-09-01), Miller, III et al.
patent: 3936958 (1976-02-01), Clapsaddle
patent: 4135142 (1979-01-01), Percy et al.
patent: 4213195 (1980-07-01), Pridham
patent: 4445361 (1984-05-01), Moffett et al.
patent: 4603408 (1986-07-01), Singhal et al.

Affiliated with

Also associated with

Rating

Sonar and calibration utilizing non-linear acoustic reradiation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sonar and calibration utilizing non-linear acoustic reradiation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sonar and calibration utilizing non-linear acoustic reradiation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1379111