JPH04324385A - Radar processing apparatus - Google Patents

Abstract

PURPOSE:To easily correct the deviation of the front direction and bow azimuth direction of a scanner unit in a radar apparatus of a ship. CONSTITUTION:A radar processing apparatus is equipped with a radar apparatus 1 transmitting a radar pulse to receive the reflected signal from a target, a radar signal processing part 2 converting the reflected signal to an echo image for PPI display, a control means 3 equipped with a radar display mode and a correction mode and a PPI display device 4 displaying the echo image. In the correction mode, the position data of the cursor image moved by a cursor moving means 5 is written in a memory 7 as correction data through a memory control means D and, in the radar display mode, the correction data is read from the memory 7 through the memory control means D and the echo image is subjected to rotary moving processing only by the angle of rotation based on the correction data by a rotary moving processing means A to be displayed.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to a radar device for ships in which a scanner unit consisting of a transmitting/receiving circuit, an antenna, an antenna rotation mechanism, etc. is mounted at a high place such as a ship's mast. The present invention relates to a technique for correcting a display direction to a desired direction.

0002

[Prior Art] Conventionally, in radar equipment for ships, a scanner unit consisting of a transmitting/receiving circuit, an antenna, an antenna rotation mechanism, etc. is usually mounted on the top of the mast or on the radar in order to improve the detection distance of the radar. It is installed in a high place such as a specially constructed radar mast. The scanner unit is equipped with an antenna that rotates at a predetermined speed, and one point in the direction of this antenna serves as a start pulse output point. This start pulse output point, for example, the position of the heading switch provided on the antenna rotating part, becomes the front of the scanner unit, and normally this front is adjusted to match the bow and stern line (heading) of the vessel. Attach the scanner unit. A function (head-up) that allows the upward direction (north of the PPI screen) on the PPI display screen of the radar device to be displayed in line with the heading by matching the heading with the front of the scanner unit (start pulse output point). function)
It is possible to achieve this. The above-mentioned work of aligning the front of the scanner unit with the heading of the ship with high precision and installing it requires work in a high place such as a radar mast.
The workability was poor and difficult. In addition, adjusting the front heading by moving the mechanical heading setting switch of the scanner unit once installed or the mounting direction of the entire scanner unit is work at a high place, and also requires adjustment. This is extremely dangerous work as there is a risk that the body may be exposed to the radar's transmitted pulses (electromagnetic waves) during the work. In this way, adjusting the direction of the scanner unit itself by moving it is dangerous, so a method is proposed that avoids working at heights and moves the PPI display to match the front and heading directions. has been done. The adjustment method is to measure and find the actual difference in heading between a target existing near the own ship's heading and the own ship's heading. Calculate the difference between the direction of the echo display and the direction on the screen,
There is a method of correcting the deviation between the actual orientation difference and the orientation difference on the screen using an orientation correction volume provided on the operation panel of the radar device.

0003

[Problems to be Solved by the Invention] In the above-mentioned conventional adjustment method, the deviation between the actual heading of the ship and the heading of the target object must be calculated using a magnetic compass or the like, so the work is extremely complicated. Furthermore, after once the bearing has been corrected, in order to confirm that the bearings match, it is necessary to wait until the PPI display sweeps once and returns to the bow display area. Then, if some deviation remains, correct the orientation again,
Also, it is necessary to wait until the PPI display sweep completes one cycle and returns to the bow display area. Since it is necessary to repeat such adjustment work and confirmation work several times, there is a problem that work efficiency is low. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a radar device for a ship that can easily correct the deviation between the front direction of a scanner unit and the heading line.

0004

[Means for Solving the Problems] The present invention includes a radar device that transmits radar pulses and receives a reflected signal from a target object, and a radar signal processing unit that converts the reflected signal into an echo image for PPI display. , a control means having a radar display mode and a correction mode, and a PP for displaying the echo image.
I display device, mode switching means for selectively switching the control means between a radar display mode and a correction mode; a memory for storing correction data; rotational movement processing means for rotating and moving the echo image by a rotation angle;
a cursor processing means for generating a cursor image to be displayed on a PPI display device; a composition means for combining the echo image and the cursor image; a cursor moving means for specifying the position of the cursor image; and a position of the cursor image. memory control means comprising data writing means for writing data into the memory as correction data and data reading means for reading out the correction data from the memory; The correction data is read from the memory, and the rotational movement processing means rotates and moves the echo image by the rotation angle based on the correction data, and displays the echo image. In the correction mode, the cursor image moved by the cursor movement means A measure was taken to write position data or movement amount data into the memory as correction data via the memory control means.

[0005]

[Operation] According to the present invention which takes the above-mentioned means, in the correction mode, the cursor is moved by the cursor moving means, and the cursor is made to coincide with the direction of the echo image from the target object located on the extension line of the bow and stern line. . The angle of the cursor at this time is written as correction data in the memory via the memory control means. In the radar display mode, the echo image input via the radar signal processing device is rotated by the rotational movement processing device by an angle based on the correction data read from the memory via the data reading device. The data is moved and displayed on a PPI display device. Therefore, the orientation of the display image on the PPI display device is rotated and displayed based on the correction data.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A radar processing apparatus according to the present invention will be explained in detail below with reference to drawings showing embodiments thereof. FIG. 1 is a block configuration diagram of a radar processing device of the present invention, FIG. 2 is a flowchart explaining correction work by the radar processing device of the present invention, and FIGS. 3 and 4 are diagrams showing display examples of the screen of a PPI display device. .

In each figure, 1 is a radar device, 2 is a radar processing device, 3 is a computer control device equipped with an image processing function, 4 is a PPI display device, 5 is a dial knob, 6 is an EBL switch, and 7 is a correction device. EEPROM, which is a rewritable nonvolatile memory for storing values and is electrically rewritable, was used. The received signal obtained by the radar device 1 is generated as an echo image in the radar processing device 2 as a radar signal processing section, and displayed on the PPI display device 4 via the control device 3 as a control means. be done.

The control device 3 includes a rotational movement processing section A as a rotational movement processing means for an echo image, a cursor processing section B as a cursor processing means for generating a cursor in a specified direction, and a cursor image processing unit A for processing an EBL cursor image. It includes a composition processing section C as a composition means for composition with the echo image, a memory control section D, and a mode switching processing section E as a mode switching means for switching between a normal radar display mode and a correction mode. .

[0009] The mode switching processing unit E
When the L switch 6 is pressed for about 2.5 seconds, the "EBL" display at the bottom left of the PPI display screen becomes "ADJ" in reverse, and the mode becomes correction mode. In the correction mode, when the EBL switch 6 is pressed again, the correction amount is set and the mode returns to the radar display mode. When in the radar display mode, the rotational movement processing section A reads out the correction amount held in the memory 7 via a memory control section D serving as a data reading means, and receives the correction amount as input from the radar processing device 2. A coordinate transformation process is performed on the echo image as an image obtained by rotating the echo image by the angle of the correction amount and output. In the correction mode, output is performed without performing rotational movement processing.

The cursor processing unit B generates a cursor image indicating an arbitrary angle on the PPI display screen by operating the dial knob 5. The angle data at this time is output to the memory control unit D as a correction amount. When in the correction mode, the synthesis processing section C superimposes the echo image from the rotational movement processing section A and the cursor image and outputs it to the PPI display device 4, and when in the radar display mode, the cursor No compositing processing with images is performed. The memory control section D reads the angle data from the memory 7 when in the radar display mode, and outputs it to the rotational movement processing section A as a correction amount, and when in the correction mode, reads the angle data from the memory 7 and outputs it to the rotational movement processing section A when in the correction mode.
By operating the L switch 6 again, the angle data held in the memory 7 is erased and the updated angle data specified in the cursor processing section B is transferred to the memory 7.
Write to. For this purpose, the memory control unit D includes a memory write circuit as a data write means that generates a voltage at a timing according to the specifications of the EEPROM.

In the radar processing apparatus having the above configuration, when correcting the front direction of the scanner unit to match the heading of the ship, the ship maneuvering and processing shown in the flowchart of FIG. 2 are performed. First, ships, buoys, breakwaters, etc. that reflect radar pulses are set as targets. Then, the ship maneuvers so that the target object is located on an extension of the own ship's bow and stern line. Of course, if there is a target similar to the above on the bow and stern line, there is no need to maneuver the vessel. At this time, when the radar device transmits and receives data, an echo image T from the target object and a heading line F that can be displayed in advance are displayed on the screen of the PPI display device 4. This heading line F
is normally displayed above (north) from the center of the PPI display section as a heads-up function.

Here, if the display of the heading line F matches the actual heading line, the echo image T from the target object is displayed superimposed on the heading line F. However, if it is shifted to the left, for example, the following correction work is performed.

[Step S-1] The EBL switch 6
Press and hold for about 2.5 seconds, and then press “ at the bottom left of the PPI display screen.
Change the display of "EBL" to the reverse display of "ADJ" and shift to the correction mode. [Step S-2] Now, by turning the dial knob 5 to the left or right, as shown in Fig. 3, the heading line F
A correction line f that overlaps appears. This correction line f is the same as the conventional EBL function (electronic azimuth cursor function). Next, by operating the dial knob 5, the displayed correction line f is rotated to match the echo image T from the target object existing on the extension of the actual bow and stern line. [Step S-3] Next, when the EBL switch 6 is pressed again, the coordinates of the echo image are rotated and displayed in the opposite direction by the angle θ created by the correction line f and the heading line F. . Therefore, the echo image T of the target object is displayed in the direction of the heading line F on the PPI display screen as well, as shown in FIG. [Step S-4] At this time, the value of the angle θ is stored and held in the memory 7. [Step S-5] Then, click “ at the bottom left of the PPI display screen.
Change the display of "ADJ" to the display of "EBL",
Return to radar display mode.

In the radar display mode, the memory control section D is placed in a reading state by a signal from the mode switching processing section E, and the echo image is corrected by the rotational movement processing section A read out from the memory 7. The coordinates are rotated in the opposite direction by the amount and output as an image. Then, in the image synthesis processing unit C, if the cursor is not displayed, the echo image is outputted,
If the cursor is displayed, it is combined with the cursor image and output.

In this way, according to this radar processing device, the displayed image on the PPI display device 4 can be adjusted between the bow and stern line and the direction directly above the screen without adjusting the mounting angle of the scanner unit itself. Matching can be done extremely easily and safely.

[0016]

As described above, according to the present invention, in the correction mode, based on the correction data specified on the screen of the PPI display device in the correction mode, the echo image by the radar device is rotated and moved and the PPI display is performed. Display on the device. Therefore, the direction of the display image on the PPI display device can be rotated and displayed based on the correction data, and there is no need to perform adjustment work at a high place such as a mast, so the direction can be corrected extremely safely. This has the effect of making it possible. Furthermore, since there is no need to wait until the radar device completes one sweep to confirm the correction state, it is possible to easily complete the direction correction work in a very short time.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram of a radar processing device of the present invention.

FIG. 2 is a flowchart illustrating correction work performed by the radar processing device of the present invention.

FIG. 3 is a diagram showing a display example of a screen of a PPI display device.

FIG. 4 is a diagram showing a display example of a screen of a PPI display device.

[Explanation of symbols]

1 Radar device 2 Radar processing device (radar signal processing section) 3 Control device (control means) 4 PPI display device 5 Dial knob (cursor moving means) 6 EB
L switch (mode switching means) 7 Memory A Echo image rotational movement processing section (rotational movement processing means) B Cursor processing section that generates a cursor (cursor processing means) C Composition processing section (composition means)

Claims (1)

[Claims] Claim 1: A radar device that transmits radar pulses and receives a reflected signal from a target object, a radar signal processing unit that converts the reflected signal into an echo image for PPI display, and a radar display mode and a correction mode. and a PPI display device for displaying the echo image, the radar processing device comprising: a mode switching means for selectively switching the control means between a radar display mode and a correction mode; a memory for storing data; a rotational movement processing means for rotating and moving the echo image by a rotation angle based on correction data; a cursor processing means for generating a cursor image to be displayed on a PPI display device; a cursor moving means for specifying the position of the cursor image, a data writing means for writing the position data of the cursor image into the memory as correction data, and data for reading the correction data from the memory. a memory control means having a readout means; in the radar display mode, the correction data is read from the memory via the data readout means, and the rotational movement processing means adjusts only the rotation angle based on the correction data; The echo image is rotated and moved and displayed, and in the correction mode, position data or movement amount data of the cursor image moved by the cursor moving means are written as correction data in the memory via the memory control means. A radar processing device characterized by: