JPH05288845A - Object-target alarm apparatus - Google Patents

Abstract

PURPOSE:To set a plurality of pieces or kinds of alarm regions without enlarging the constitution of a hardware device. CONSTITUTION:According to a control signal from a CPU 14, a time-series control part 17 writes a plurality of alarm regions sequentially into a memory 18 for alarm judgment. This write operation is performed in synchronization with the scanning operation of a screen at a display device 21. A judgment circuit 19 executes a judgment on the basis of data in a memory 13 for radar image use. When a prescribed condition is satisfied, a signal is output. The CPU 14 executes a judgment by means of an alarm condition according to the signal is generated or not. According to the result of the judgment, an image is blinked on the screen at the display device 21, and a sound is generated by means of a buzzer 23. It is not required to install a plurality of hardware devices, and an approaching alarm and a leaving alarm can be set simultaneously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a target alarm which sets an alarm area on a radar image and issues an alarm when a target enters or leaves the alarm area. Regarding the device.

[0002]

2. Description of the Related Art A marine vessel or the like is equipped with a radar device for detecting a target (another vessel or the like) existing around it. This type of radar device is a device that transmits a radio wave at a predetermined timing while rotating an antenna in a horizontal plane and receives a reflected wave from a target existing in the vicinity by the antenna to obtain a radar image. The radar image includes an image showing the presence of the target, its size, etc. By monitoring this image, movement of the target can be detected.

The target warning device is a device for issuing a warning by sound, light or the like when the movement of the target is related to the operation of the own ship.

When the movement of another ship or the like is detected and an alarm is issued in the target alarm system, a means called setting of an alarm area is used as a means thereof. For example, an alarm area having a fan shape, a donut shape, or the like is set in advance. Although the target moved and the signal level above the specified value was not obtained in the alarm area until then,
If a signal above the level is obtained at a certain point, it can be considered that the target has entered the alarm area. In this case, it is possible to issue an alarm when the target enters. Further, as the alarm condition, in addition to such an approach alarm, a departure alarm that gives an alarm when the target leaves the alarm area can be adopted.

[0005]

When it is desired to set a plurality of or a plurality of types of alarm areas in a target alarm device having such a function, for example, a plurality of alarm area setting / judging hardware is used. Was there. In this case, the device configuration is enlarged and the device price is increased. For example, there is a method in which a plurality of alarm areas are written in a memory for alarm determination and the determination related to the alarm generation is performed. According to this method, it is possible to set multiple alarm areas at the same time without using multiple hardware, and it is also possible to set an alarm area having a complicated shape.
It was difficult to identify in which of the plurality of alarm areas the alarm condition was satisfied. Further, it has been difficult to set any one of the plurality of alarm areas as an entry alarm or one as a departure alarm.

The present invention has been made to solve the above problems, and it is possible to set a plurality of alarm areas with simpler hardware and to enter an alarm condition for each alarm area. The purpose is to enable selective mixed setting from both alarms and departure alarms.

[0007]

In order to achieve such an object, the target alarm system of the present invention comprises means for sequentially developing a plurality of alarm areas one by one on a memory for alarm determination. Characterize.

A second aspect of the present invention is characterized by comprising a scanning type display for displaying a radar image, and developing one alarm area each time the screen of the display is scanned once. To do.

Further, a third aspect of the present invention is characterized in that an alarm condition is set for each alarm area.

[0010]

In the target alarm system of the present invention, a plurality of alarm areas are sequentially developed one by one on the memory for alarm determination. For example, processing for a plurality of alarm areas is performed such that the first alarm area is set, the determination related to the alarm generation is executed, and then the second alarm area is set and the determination related to the alarm generation is executed. Can be executed in chronological order. The hardware required for this process is
The hardware required to handle a single alarm area is sufficient.

Further, according to the present invention, it is possible to sequentially expand the alarm areas in synchronization with the screen scanning of the display as claimed in claim 2, and as in claim 3, an alarm is issued for each alarm area. It is possible to set conditions such as an entry alarm for a certain alarm area and a departure alarm for another alarm area.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a radar device according to an embodiment of the present invention. The radar device shown in this figure has a target alarm function that sets a plurality of alarm regions in time series and sequentially executes determinations related to alarms.

The apparatus shown in this figure comprises an indicator section 10 and an antenna section 30. Although not shown, the antenna section 30 has a configuration including an antenna, a motor for driving the antenna, a transceiver, and the like. The antenna of the antenna unit 30 is rotated in the horizontal plane by the drive motor and transmits the signal supplied from the transceiver to the surroundings. The transceiver executes this transmission operation at the timing given by the CPU 14 incorporated in the indicator unit 10. The antenna receives a reflected wave from a target existing in the surroundings, and the transceiver transmits the received signal to the indicator unit 1.
Output to 0.

The A / D conversion unit 11 of the indicator unit 10 receives this reception signal from the transceiver of the antenna unit 30, converts it into digital data, and inputs it to the coordinate conversion unit 12. The signal obtained by the transmitting / receiving operation of the antenna unit 30 is a signal related to the reflected wave of the radio wave transmitted when the antenna is facing a certain direction, and thus is basically a polar coordinate type signal. The coordinate conversion unit 12 generates a write address to the radar image memory 13 under the control of the CPU 14 in order to convert the polar coordinate format data obtained via the A / D conversion unit 11 into the rectangular coordinate format. This address (X, Y) can be generated by the following equation based on the time required for transmission / reception (distance R to the target) and the azimuth θ of the antenna.

X = XS + R × cos θ Y = YS + R × sin θ where (XS, YS) is the ship position displayed at the center of the radar image.

When the data is developed on the radar image memory 13 in this way, the data is transferred to the mixer circuit 2.
It is supplied to the display device 21 via 0. The display device 21 is, for example, a raster scan type CRT, and is a display device in a rectangular coordinate format. Further, the CPU 14 expands the data such as the setting range, VRM, and EBL on the graphic character memory 16 via the memory control unit 15. The mixer circuit 20 displays a graphic image on the screen of the display 21,
In order to display a character image, the data on the radar image memory 13 and the graphic character memory 1
6 is a circuit for superimposing the above data.

Further, the circuit of this embodiment comprises a time-series gate controller 17, an alarm judgment memory 18, a judgment circuit 19, an alarm sound drive circuit 22 and a buzzer 23.

The alarm determination memory 18 is a memory for storing data indicating the alarm area in order to set the alarm area on the radar image. The determination circuit 19 includes the data on the radar image memory 13 and the alarm determination memory 18
With reference to the above data, a signal is output depending on whether or not the target included in the data on the radar image memory 13 has entered the alarm area on the alarm determination memory 18. For example, a signal is output when it can be considered that the target has entered the alarm area. The determination circuit 19 gives the data related to the alarm area to the mixer circuit 20, and
The alarm area is displayed in a rectangular shape, a fan shape, or the like on the first screen.

The feature of this embodiment is that a plurality of alarm areas can be set, and each alarm area can be set as both an entry alarm and a departure alarm.

For example, as shown by 1 to 5 in FIG.
When setting individual alarm areas, the CPU 14
Gives a signal to the memory control unit 15, clears the data for the alarm determination memory 18, and resets the output of the determination circuit 19. The CPU 14 gives a control signal to the time-series gate control unit 17 to write the data related to the alarm area 1 on the alarm determination memory 18.

The judgment circuit 19 is an alarm area (for example, alarm area 1) written in the alarm judgment memory 18.
Based on the above, the above-mentioned determination operation is executed, and when the signal generation condition is satisfied, a signal is output to the CPU 14. CPU
When the alarm area 1 is an entry alarm, 14 issues an alarm according to the signal output from the determination circuit 19. For example, the data is expanded on the graphic character memory 16 via the memory control unit 15, and an alarm is issued by blinking the frame of the alarm area on the screen of the display 21. Alternatively, a signal is given to the alarm sound drive circuit 22 and the alarm sound is generated by the buzzer 23.

Next, the CPU 14 starts the operation related to the next alarm area after one scan of the screen of the display 21 is completed. That is, the alarm determination memory 18 is cleared via the memory control unit 15, the output of the determination circuit 19 is reset, and then a control signal is given to the time-series gate control unit 17 so that the data related to the alarm area 2 is displayed. The warning determination memory 18 is written. The determination circuit 19 repeats the same operation for the alarm area 2.

Therefore, according to the present embodiment, even if a plurality of alarm areas 1 to 5 are set as shown in FIG. 2, the alarm areas 1 to 5 are not enlarged without increasing the hardware configuration. It is possible to execute the processing according to (1), and it is possible to set different alarm conditions (entry alarm, departure alarm) in each of the alarm areas 1 to 5. Since only one alarm area is processed at one time, it is possible to identify which alarm area has the alarm condition established. Furthermore, since this operation is executed in synchronization with the scanning of the display 21, as shown in FIG.
On the screen, all the alarm areas 1 to 5 appear to be displayed at the same time, and the viewability of the screen is secured.

The present invention does not limit the number or shape of the alarm areas.

[0026]

As described above, according to the present invention, a plurality of alarm areas are sequentially developed one by one for alarm determination. Therefore, a plurality of or a plurality of types of alarm areas can be obtained without enlarging the hardware configuration. It is possible to set the alarm area of, and the target alarm device with high usability is realized.

According to the second aspect of the present invention, the alarm area is developed in synchronization with the scanning of the screen of the display device, that is, at a sufficiently high speed for visually recognizing the screen. Does not fall.

According to the third aspect of the present invention, since the alarm condition is individually set for each alarm area, an entrance alarm is set for a certain alarm area and a departure alarm is set for another alarm area. Can be set.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a radar device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an alarm area developed on a memory for alarm determination.

FIG. 3 is a diagram showing an example of a screen of a display device in the present embodiment.

[Explanation of symbols]

 10 Indicator Unit 13 Radar Image Memory 14 CPU 15 Memory Control Unit 17 Time Series Gate Control Unit 18 Alarm Judgment Memory 19 Judgment Circuit 21 Display 22 Alarm Sound Drive Circuit 23 Buzzer

Claims (3)

[Claims] 1. A radar image memory in which data related to a radar image is expanded, an alarm determination memory in which an alarm area set on the radar image is expanded, and an object included in the data in the radar image memory. The data related to the image of the mark is
A judgment circuit that outputs a signal of a predetermined value when a predetermined signal generation condition is satisfied for the alarm area on the alarm judgment memory, and the target is set in the alarm area according to the value of the signal from the judgment circuit. Control means for determining whether or not a predetermined alarm condition is satisfied, and generating an alarm when the predetermined alarm condition is satisfied,
A target warning device comprising: a target warning device, comprising means for sequentially developing a plurality of alarm regions one by one on a memory for alarm judgment. 2. The target alarm system according to claim 1, further comprising a scanning type display for displaying a radar image, wherein the control means has one alarm area every time the screen of the display is scanned once. Target alarm device characterized by deploying. 3. The target alarm system according to claim 1, wherein the control means sets an alarm condition for each alarm area.