United States Patent
US Patent 7463553: Underwater detection device
US 7463553 ยท granted 2008-12-09
Abstract
In an under water detection for detecting the phase difference of an echo by two reception beams according to a split beam method, the difference .DELTA..theta. between the phase difference of an echo detected by first and second reception beams formed in some direction and the phase difference of the echo detected by first and second reception beams which is formed in a direction rotated from the former direction concerned by a predetermined angle is detected by a phase detector. A reliability judging unit judges whether the difference .DELTA..theta. detected by the phase detector is within a predetermined range or not. If the difference .DELTA..theta. is within the predetermined range, an echo is displayed on a display unit. If the difference .DELTA..theta. is not within the predetermined range, the echo is displayed with a specific color tone or the echo is not displayed.
| Patent Number | 7463553 |
|---|---|
| Title | Underwater detection device |
| Filed | 2008-03-25 |
| Granted | 2008-12-09 |
| Inventor(s) | Dubuis; Jerome, Maeno; Hitoshi |
| Assignee | Furuno Electric Company Limited |
| CPC Classification | G01S 15/87 |
| Number of Claims | 20 |
Abstract
In an under water detection for detecting the phase difference of an echo by two reception beams according to a split beam method, the difference .DELTA..theta. between the phase difference of an echo detected by first and second reception beams formed in some direction and the phase difference of the echo detected by first and second reception beams which is formed in a direction rotated from the former direction concerned by a predetermined angle is detected by a phase detector. A reliability judging unit judges whether the difference .DELTA..theta. detected by the phase detector is within a predetermined range or not. If the difference .DELTA..theta. is within the predetermined range, an echo is displayed on a display unit. If the difference .DELTA..theta. is not within the predetermined range, the echo is displayed with a specific color tone or the echo is not displayed.
Claim 1
An underwater detection device including a transducer array for transmitting ultrasonic waves to a predetermined area in water and receiving an echo reflected from atarget, the transducer array being divided into a first array and a second array, a first reception beam formed by the first array and a second reception beam formed by the second array being formed in plural directions in the predetermined area toreceive an echo, a coming direction of the echo being detected on the basis of the phase difference of the echo received by the first and second arrays and the distance between the first and second arrays, and also the picture of the echo concerned beingdisplayed on the screen, comprising: a detecting unit for detecting the difference between the phase difference of an echo detected by the first and second reception beams formed in some direction and the phase difference of the echo detected by thefirst and second reception beams formed in a direction which is rotated from the former direction by a predetermined angle; and a judging unit for judging whether the difference detected by the detecting unit is a value within a predetermined range, andwhen it is judged by the judgin
Claims
20 totalAn underwater detection device including a transducer array for transmitting ultrasonic waves to a predetermined area in water and receiving an echo reflected from atarget, the transducer array being divided into a first array and a second array, a first reception beam formed by the first array and a second reception beam formed by the second array being formed in plural directions in the predetermined area toreceive an echo, a coming direction of the echo being detected on the basis of the phase difference of the echo received by the first and second arrays and the distance between the first and second arrays, and also the picture of the echo concerned beingdisplayed on the screen, comprising: a detecting unit for detecting the difference between the phase difference of an echo detected by the first and second reception beams formed in some direction and the phase difference of the echo detected by thefirst and second reception beams formed in a direction which is rotated from the former direction by a predetermined angle; and a judging unit for judging whether the difference detected by the detecting unit is a value within a predetermined range, andwhen it is judged by the judgin