Echo image generating device

Patent metadata

Field	Value
Publication number	US-2019391257-A1
Application number	US-201916446659-A
Country	US
Kind code	A1
Filing date	Jun 20, 2019
Priority date	Jun 20, 2018
Publication date	Dec 26, 2019
Grant date	—

Abstract

An echo image generating device may be provided, which includes a signal acquiring module, a sensitivity setting module, and a screen generating module. The signal acquiring module may acquire an echo signal from a target object around a ship. The sensitivity setting module may perform a first sensitivity setting for the echo signal in a first range, and a second sensitivity setting for the echo signal in a second range without including the first range, the second sensitivity setting being different from the first sensitivity setting. The screen generating module may generate an echo image of the first range based on the first sensitivity setting, and generate an echo image of the second range based on the second sensitivity setting.

First claim

What is claimed is:

1 . An echo image generating device, comprising:
processing circuitry cpfigured to:
acquire an echo signal from a target object around a ship;
perform a first sensitivity setting for the echo signal in a first range, and a second sensitivity setting for the echo signal in a second range without including the first range, the second sensitivity setting being different from the first sensitivity setting; and
generate an echo image of the first range based on the first sensitivity setting, and generate an echo image of the second range based on the second sensitivity setting.

2 . The echo image generating device of claim 1 , wherein the first range is a short-distance range located at a short distance from the ship, and the second range is a long-distance range located at a long distance from the ship, and
wherein the processing circuitry sets the first sensitivity of the echo signal in the short-distance range lower than the second sensitivity of the echo signal in the long-distance range.

3 . The echo image generating device of claim 2 , wherein the processing circuitry sets a first gain for the echo signal in the first range, and a second gain higher than the first gain for the echo signal in the second range.

4 . The echo image generating device of claim 2 , wherein the processing circuitry generates a first echo image of a lower sensitivity and a second echo image of a higher sensitivity, based on the echo signal, and
wherein the echo image is generated by synthesizing a portion corresponding to the first range included in the first echo image, and a portion corresponding to the second range included in the second echo image.

5 . The echo image generating device of claim 1 , wherein the processing circuitry places an indication of a position of the boundary between the first range and the second range on a screen including the echo image.

6 . The echo image generating device of claim 5 , wherein the processing circuitry places the indication on the screen both when the boundary is located inside a display range of the echo image, and when the boundary is located outside the display range.

7 . The echo image generating device of claim 5 , wherein the processing circuitry places a boundary line drawn along the boundary as the indication on the echo image.

8 . The echo image generating device of claim 5 , wherein the processing circuitry is further configured to change a position of the boundary according to an input by a user,
wherein when the position of the boundary is changed, the processing circuitry changes the indication according to the position after the change of the position.

9 . The echo image generating device of claim 7 , wherein the processing circuitry is further configured to change a position of the boundary according to an input by a user who slides the boundary line,
wherein when the position of the boundary is changed, the processing circuitry moves a position of the boundary line according to the position after the change of the position on the echo image.

10 . The echo image generating device of claim 5 , wherein the processing circuitry is further configured to automatically change a position of the boundary based on a position inputted by a user and a position of the ship,
wherein when the position of the boundary is changed, the processing circuitry changes the indication according to the position after the change of the position.

11 . The echo image generating device of claim 1 , wherein the processing circuitry assigns a color palette to the echo signal in the first range and assigns a different color palette to the echo signal or an echo trail in the second range.

12 . The echo image generating device of claim 1 , wherein the processing circuitry assigns a video slope to the echo signal in the first range and assigns a different video slope to the echo signal or an echo trail in the second range.

13 . The echo image generating device of claim 1 , wherein the first range is a circular range centering on a position of the ship, and the second range is a range adjacent to the first range and surrounding the first range from outside.

14 . A radar device, comprising:
the echo image generating device of claim 1 ; and a radar antenna configured to receive the echo signal.

15 . A method of generating an echo image, comprising the steps of:
acquiring an echo signal from a target object around a ship; performing a first sensitivity setting for the echo signal in a first range and a second sensitivity setting for the echo signal in a second range without including the first range, the second sensitivity setting being different from the first sensitivity setting; and generating an echo image of the first range based on the first sensitivity setting and generating an echo image of the second range based on the second sensitivity setting.

Assignees

• Furuno Electric Co

Inventors

• Nakahama Masahiro

Classifications

• G01S7/22

  Producing cursor lines and indicia by electronic means · CPC title

• G01S13/89 Primary

  for mapping or imaging · CPC title

• G01S7/066 Primary

  with means for showing the history of the radar trails, e.g. artificial remanence · CPC title

• G01S7/062

  in which different colours are used · CPC title