WO1992022828A1

WO1992022828A1 - Radar vigilance-alarm system

Info

Publication number: WO1992022828A1
Application number: PCT/JP1992/000738
Authority: WO
Inventors: Yoshiyuki Kiya; Koichi Aridome; Takashi Yoshihara; Hidetoshi Tanigaki
Original assignee: Furuno Electric Company, Limited
Priority date: 1991-06-10
Filing date: 1992-06-10
Publication date: 1992-12-23
Also published as: GB2263208B; GB2263208A; JPH04363689A; JP2951749B2; GB9302127D0

Abstract

A radar vigilance-alarm system wherein operational modes can be set automatically. When a vigilance range is set within a radar coverage and no target exists within the vigilance range, a target intrusion alarm mode is set. On the contrary, when a vigilance range is set and a target exists within the vigilance range, then, a target leaving alarm mode is automatically set. In a target intrusion alarm mode, an alarm is given when a target intrudes into the vigilance range; and, in a target leaving alarm mode, an alarm is given when the target leaves the vigilance range. With the above-described arrangement, a two-stage operation including setting of a vigilance range and setting of an alarm mode can be dispensed with, so that erroneous mode setting can be eliminated and surveillance as intended by an operator can be performed.

Description

Incense

Title of invention

Radar Lookout Alarm Technical Field

The present invention relates to a radar lookout alarm device S that issues a substitute report according to the position of a target detected by a radar within a lookout setting range set within the radar detection range. In particular, the present invention relates to a radar apparatus having an intrusion notification function for issuing an alarm when an object enters a set range and an alarm function for issuing an alarm when a target leaves the set area. Background art

Ships are equipped with a pulse radar device that emits pulsed radio waves from a radar antenna and measures the time difference between the return of the reflected wave from the target and the distance from the antenna to the target. . Such a radar device detects the target existing in all directions around the own ship by changing the directivity angle of the antenna around the antenna in all directions around the antenna. Also, in many cases, a watch alarm function is provided in which a certain range is set in advance in the detection range, and an alarm is issued when an object enters the set range. This look-out surveillance function is determined in advance based on, for example, the heading of the ship itself. It automatically notifies that the target has approached the set distance in the range of the angle, and this is used for collision prevention. Conversely, U.S. Pat. No. 4,310,552 or Japanese Patent Application Laid-Open No. H11-21078 conversely discloses that a substitute report is issued when an object goes out of a preset range. It has been shown that this can be used as a navigational aid when traveling with a convoy.

The target intrusion alarm function that is issued when a target enters the set range and the object release alarm function that issues a report when a target comes out of the set range can be used according to the purpose. Yes, these two functions can be provided in one radar device. However, if it is desired to set the alarm mode and the lookout range separately as in the past, for example, set the target intrusion mode and set the targetless range as the watchout range, or It is necessary to set the departure warning mode, and set the area where the target target exists as a watch area. In such a setting method, it is necessary to go through two steps, the setting of the mote 'and the setting of the lookout range. Not only is the operability not good, but for example, the wrong mode is set contrary to the purpose. However, there is also a problem that an alarm is issued immediately after the mode is set. Disclosure of the invention

An object of the present invention is to merely set a lookout range, and An object of the present invention is to provide a radar surveillance alarm device which automatically sets the target intrusion alarm mode or the object departure alarm mode, and solves the above-mentioned problem.

Another feature of the present invention is that the radar antenna is rotated to sequentially emit detection pulse signals in different directions, return echo signals are received, and displayed on a display device, thereby exploring and displaying the situation around the antenna. An object of the present invention is to provide a radar device S that is automatically set to either a target intrusion alarm mode or a target departure report mode intended by an operator simply by setting a lookout range in a radar device.

One feature of the present invention is that the radar look-up alarm device S is provided with a means for setting a look-out range within a detection range, a means for detecting the presence or absence of a target within the look-out range, and Means for setting the target intrusion alarm mode when there is no target within the range, and means for setting the target departure report mode when there is a target within the lookout range when the setting of the lookout range is completed. In the target intrusion report mode, a means to detect the intrusion of the target into the lookout range and issue an alarm, and in the target departure report mode, to detect the departure of the target out of the lookout range.蒈 means for issuing reports.

Another feature of the present invention is a radar device which rotates a radar antenna, sequentially emits detection signals in different directions, receives a returning echo signal, and displays the surroundings of the antenna on a display, Watch on Means for setting a range, means for detecting the presence or absence of a target within the lookout range, and means for setting the target intrusion report mode when no target is within the lookout range when the setting of the lookout range is completed. When there is a target within the lookout range when the lookout range has been set, means to set the target departure warning mode, and in the target intrusion warning mode, a warning is issued by detecting the intrusion of a target into the lookout range. A means for issuing a warning and a means for detecting a departure of the target from the surveillance range and issuing an alarm in the target difficulty escape report mode.

In the radar lookout alarm device of the present invention, by setting the desired φ lookout range within the detection range, when there is no target within the lookout range, the target intrusion alert mode is set, and conversely, the object is placed within the lookout range. When there is a target, the target departure warning mode is set. In the target intrusion warning mode, a surrogate alert is issued when a target enters the lookout range, and in the target detachment hairpin report mode, an extra alert is issued when the target leaves the lookout range. Therefore, if a surveillance is issued when a target enters the guard area, it is only necessary to set the desired area where the target does not exist as the guard area. In order to issue an alarm when a target is tracked, it is only necessary to set the area including the target to be tracked as a watch area. Therefore, it is not necessary to perform the operation of selecting and setting both modes before or after setting the lookout range, thereby preventing erroneous setting due to misunderstanding. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 shows a block diagram of a main part of a radar lookout warning device g according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure of the radar lookout warning device.

FIG. 3 is a flowchart showing a processing procedure of the radar lookout warning device S.

FIG. 4 is a diagram showing a method of setting a lookout range.

FIG. 5 shows a partial configuration diagram of a radar lookout warning device according to another embodiment. Example

In Fig. 1, the antenna unit 1 is composed of an antenna, an output circuit that emits pulsed radio waves in response to a trigger pulse sent from the transmission / reception circuit 2, a circuit that converts a received signal to an intermediate frequency signal, and an antenna. Includes a drive circuit for rotating, a circuit for generating a heading pulse and a bearing pulse, and the like. The transmission / reception circuit 2 includes a counter that counts the time since the generation of the trigger pulse, that is, a distance, an azimuth counter that is reset by a heading pulse and counts a bearing pulse, and the like. And outputs the intermediate frequency video signal to the amplification detection circuit 3. Amplification detection circuit 3 The signal is amplified and detected. Binarization circuit 4 converts the echo signal into a binary signal. The primary memory 5 stores one sweep of echo data. The output signal of the primary memory 5 is supplied to the input terminal of the correlation circuit 51 and the image memory in the display control circuit 20. The output signal of the correlation circuit 51 is supplied to one input terminal of the AND gate 13. Registers 6 and 7 store the azimuth lookout ranges 01 and 02, and registers 8 and 9 store the distance lookout ranges Rl and R2. The azimuth gate signal generation circuit 10 sets the output to 1 when the antenna direction is within this range, based on the set azimuth direction guard ranges 0 1 and 0 2. The departure gate signal generation circuit 11 sets the output to 1 when the time since the transmission / reception circuit 2 generates the trigger pulse is within the range, based on the lookout ranges R 1 and R 2 in the distance direction. The AND gate 12 calculates the logical product of the azimuth gate signal and the distance gate signal. The AND gate 13 calculates the logical product of the output of the AND gate 12 and the output of the correlation circuit 51. When the output of the AND gate 13 is "1", the state of the flib frog 14 is recorded. A program to be executed by the CPU 16 is written in R0M18 in advance. The CPU 16 executes the program in the ROM 18 and causes the entire device to function as a radar device and a radar watch alarm device. The RAM I9 is used as various flags described later and other working areas. The IZO port 15 is connected to the flit blob 14 and the CPU 16 is connected via the IZO boat 15 To read the status of flip-flop 14 and reset it. The display control circuit 20 has a built-in image memory, sequentially reads data from the image memory, creates a video signal, and outputs it to the display unit 21. As a result, the display unit 21 displays the radar image. The CPU 16 writes the detected radar image to the image memory in the display control circuit 20, and also writes character data indicating the content of the report when outputting the report. The drive circuit 22 drives the sounding body 23 and emits an alarm sound at the time of reporting the hairpin. The I / O port 17 is connected to registers 6 to 9, and the CPU 16 sets data indicating the guard range to the registers 6 to 9 via the I / O boat 17. The interface circuit 24 detects the operation state of the key switch 25. The interface circuit 26 detects the operation state of the trackball 27. The CPU 16 reads the key operation contents and the trackball operation contents via the interface circuits 24 and 26.

Fig. 4 shows the relationship between the values set in the registers 6 to 9 shown in Fig. 1 and the lookout range.

In FIG. 4, 0 1 and 0 2 indicate an azimuth lookout range, and R 1 and R 2 indicate a distance direction lookout range. Therefore, by setting the two points (R1, 01) and (R2, Θ2) in polar coordinates, the range indicated by hatching in FIG. In addition, by setting two points using a trackball, The configuration for setting the configuration is described in detail in U.S. Pat.No. 5,032,842, particularly in FIG. 4, and the description relating to the configuration is described in the specification of the patent gazette. .

Also, a configuration for displaying a lookout range set by setting two points using a trackball on a display device is described in U.S. Pat.No. 5,032,842, particularly in FIG. The description related to the configuration is described in the specification of the patent publication. If the output signal of the marker display memory 1i shown in FIG. 3 is supplied to the display unit 21 shown in FIG. 1 of the present application, the watch range is used as a marker as shown in FIG. 4 of the present application. Can be displayed on the radar display in a square shape.

Now, if the processing procedure of the CPU 16 shown in FIG. 1 is represented by a flowchart, it is as shown in FIG. 2 and FIG. Fig. 2 shows the main part of the main routine. First, the key is read (nl). If there is any key input, perform the processing corresponding to the operated key. If there is no key operation, the operation status of the trackball is read (n2 → nl2). Display the cursor according to the state of the flag F1 by shooting. This flag F1 stores that the first operation of the lookout range setting key, which will be described later, is performed, and F1 = 0 (reset state) in the initial state. Therefore, at first, a cross-shaped cursor is displayed on the screen by operating the trackball, The cursor moves in accordance with the operation of the rule (n1 2 → n13-n14-n1 · · · ·). When the lookout range setting key is operated, the coordinate values R 1 and 0 1 of the cross-shaped cursor moved by the tragic ball are set to the registers 8 and 6 shown in FIG. 1, respectively (n 3 → n 4 n 5). Thereafter, the flag F1 is set and the fact that the first look-out range setting key has been operated is stored (n6). Then, when the trackball is operated again, as shown in Fig. 4, the point (R2, Θ2) moves while the point (R1, 01) is fixed, and the point corresponding to that moves. A fan-shaped cursor, that is, a watch range is displayed. (N13 → n15). Thereafter, when the lookout range setting key is operated, the coordinate data R2, 02 of the cursor is set to the registers 9, 7 shown in FIG. 1 (n4n8), respectively. Fire and reset the flag F1, reset the flip-flop 14 shown in FIG. 1 and start the timer (n9 → nl0 → nl1). FIG. 3 shows an interrupt process performed in response to an interrupt, for example, every 100 to 200 msec. If an interrupt occurs, the contents of the flip-flop (see 14 in FIG. 1) are read first, and if the flip-flop is in the reset state, the state of the flag Fout is determined (n20) ~ »N 2 1 → n 2 2). The flag Fout is a flag for storing the target departure report mode, but is in a reset state in an initial state. Therefore, the flag Fin is subsequently determined (n23). This flag Fin is a thing (4) This flag is useful for the intrusion replacement mode, but it is also reset in the initial state. Therefore, thereafter, it is determined whether or not the timer has exceeded a predetermined time T1 (n24). Here, T 1 is the time required for the antenna to make one round. In FIG. 2, if the flip-flop FF is in the reset state even after the time required for one round of the antenna has elapsed since the completion of setting the lookout range, the flag Fin is set as shown in step nl1. To set the target intrusion alarm mode (n25). If the flib-flob FF remains in the reset state even after the target intrusion report mode has been set, no alert is issued (n20- → n2l-n22- »n23- R ETURN). Then, when a target enters the lookout range in the target intrusion alert mode, the direction gate signal generation circuit 10 and the distance gate signal generation circuit 11 shown in Fig. 1 and the AND condition of these and the echo signal Flip flops 14 are set. If the reset state of the FF is read, an alarm is output (n20—n21—n27—n28 → n26). In the above example, the range where the target does not exist is set as the lookout range.If the range where the target exists is set as the lookout range, one round of the antenna FF is set by the time T1 required for the operation. As a result, the flag F 0 ut is set and the mode becomes the target chick removal mode (n 20 to n 21 to n 27 to n 28—n 29 n 30). this —, _O

O 92/22828 In the departure warning mode, after reading the set state of the flip-flop FF, the flip-flop FF is reset (n31). If an object exists within the lookout range, the flip-flop 14 is set again by the AD condition with the gate signal shown in FIG. In this target departure warning mode, if the flip-flop FF remains in the reset state, an alarm is output (n20 "→ n2 1 n2 2 π26) _β

Just by setting the lookout range as described above, monitoring will be automatically set to either the object intrusion warning mode or the target departure warning mode according to the state at the time of setting. .

Although the above embodiment is an example in which the guard range is set in the polar coordinate format, for example, by configuring the gate signal generation circuit as shown in FIG. 5, the guard range is set in the X-Υ rectangular coordinate format. Can also be set. In FIG. 5, reference numerals 30 and 31 denote registers for setting the X-direction ranges X 1 and X 2 of the look-out range, and 32 and 33 denote registers for setting the Υ-direction ranges Υ 1 and Υ 2 of the look-out range. The X-direction gate signal generation circuit 34 generates an X-direction gate signal based on XI and X2. The γ-direction gate signal generation circuit 35 generates a Υ direction gate signal based on the values of Yl and Υ2. The AND gate 36 performs an AND operation on the X-direction gate signal and the Y-direction gate signal. The AND gate 37 calculates the logical product of the output of the AND gate 36 and the read signal of the radar echo screen. Where radar The read signal of the echo screen is a signal at the stage of displaying on a CRT monitor, for example. In this way, a desired rectangular range of the detection range can be set as the watch range. The invention's effect

According to the present invention, the setting operation of the target intrusion replacement report mode and the target detachment report mode becomes unnecessary, and the mode is automatically set to the operator's intention only by setting the lookout range within the detection range. Is done. This prevents malfunctions due to incorrect mode settings and enables safe navigation of ships and other vehicles.

Claims

The scope of the claims

(1) means for setting a lookout range within the detection range;

Means for detecting the presence or absence of an object within the guard area;

Means for setting the target intrusion warning mode when there is no target within the guard area when the guard area setting is completed;

Means for setting the target departure warning mode when there is a target within the lookout range at the completion of the lookout range setting;

Means for detecting an intrusion of a target into the surveillance area and issuing an alarm in the target intrusion replacement message;

A radar surveillance alarm device comprising means for detecting a departure of a target outside the surveillance range and issuing an alarm in the target departure kiyoshi mode.

(2) A radar device that rotates a radar antenna, sequentially emits detection signals in different directions, receives a return echo signal, and displays the surroundings of the antenna on a display,

Means for setting a lookout range within the detection range;

Means for detecting the presence or absence of an object within the guard area;

Means for setting a target intrusion alarm mode when there is no target within the guard area when the guard area setting is completed;

Means for setting the object departure warning mode when there is an object within the guard area when the guard area setting is completed;

Detecting intrusion of a target into the area of watch Means to alert

A radar apparatus comprising: means for detecting a departure of a target out of a lookout range and issuing a surrogate report in an object release mode.

(3) The radar according to (2), wherein the means for setting the lookout range sets the lookout range by specifying at least two points in the distance direction and the azimuth direction with respect to the radar antenna. Equipment.

(4) A radar device that rotates the radar antenna, sequentially emits detection signals in different directions, receives the returning echo signal, and displays the surrounding state of the antenna on the display device.

Means for setting a lookout range within the detection range;

Signal generation means for generating a signal representing the lookout range;

Display means for displaying the guard range on the display based on the output signal of the signal generation means;

Means for detecting the presence or absence of a target within the lookout range;

Means for setting a target intrusion report mode when there is no target within the guard area when the guard area setting is completed;

Setting of a lookout range; means for setting a target departure warning mode when there is an object within the lookout range upon completion;

In the target intrusion report mode, a means for detecting the intrusion of an object into the guard area and issuing an alarm,

In the object departure warning mode, detection of object departure outside the guard area And a means for issuing an alarm.