JPS60210785A - Display system of object existing region - Google Patents

Abstract

PURPOSE:To enhance the display efficiency of the lost state of an object and the efficiency of position localization and motion analysis after researching, by converting an object existing region based on searching information directly before the lost of the object to a display mode different from that at the time of searching prior to displaying the same. CONSTITUTION:An object searching sensor 1 sends out lost status information to an object motion analytical apparatus 3 when loses an object. The apparatus 3 converts the object existing region displayed by a display apparatus 6 to the display of the object exsiting region of which the display mode is changed from that at the time of searching and allows a memory apparatus 4 to store object lost information. By this method, an operator can easily recognize that the sensor 1 lost the object and an optimum working method for researching can be determined.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention is directed to a target searching device that performs position localization and motion analysis of a desired target. This invention relates to a target presence area display method for displaying detected information.

[Background of the invention]

For example, underwater target search sensors are shifting to passive sensors with longer detection ranges to enable wide-area searches. Detection information from passive sensors is greatly influenced by the marine environment and other factors, making it unstable and easily lost. Further, the information obtained is azimuth information (including azimuth width), and the target existence area is vast. In the conventional operation method using such passive sensors, there is no effective way to process and display information when lost, and it is difficult to localize or
It was difficult for the operator conducting the motion analysis to accurately grasp the situation when the vehicle was lost.

[Purpose of the invention]

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and in a target search device, when the target search sensor loses the target, it displays the situation and localizes the position after re-detection.
The object of the present invention is to provide a method for displaying a target area that allows motion analysis to be carried out efficiently.

[Summary of the invention]

The target presence area display method according to the present invention determines the target presence area based on the detection information of the target search sensor and the detection ability of the target search sensor that is set in advance by a prediction device.
In addition to performing position localization and motion analysis on the desired target, the detection information is stored, and when the target search sensor loses the target, it detects the target area based on the detection information immediately before the target was lost. The time is converted into a different display format for display.

Note that by displaying the past target existing regions before the target is lost in chronological order, the target search can be made more efficient.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram of a target search device used in an embodiment of the target area display method according to the present invention, FIG. 2 is an explanatory diagram of the target area display, and FIG. FIG. 4, which is an explanatory diagram of the time-series display of the existence area, is the same flowchart.

This device includes a target search sensor (for example, a sonar, hereinafter referred to as a sensor) 1 for detecting a target, a prediction device 2 that estimates the detection ability of the sensor 1, and a prediction device 2 that uses the detection information of the sensor 1 and the prediction device 2. A target motion analysis device 3 that performs target position localization and motion analysis based on prediction results, a storage device 4 that stores detection information, prediction results, etc., and a prediction device 2.
．． an input device 5 for inputting various commands, data, etc. for controlling the operation of the target motion analysis device 31 and display device 6;
Detection information of sensor 1 and prediction device 2. It is comprised of a display device 6 that displays the processing results of the target motion analysis device 3 or various control information input by the operator from the input device 5.

First, when the sensor 1 detects a target, the target motion analysis device The target existence area requested by 3 is sent to the display device 6, and is shown in FIG. 2(a), for example.
Displayed as shown in -. This target presence area is updated every time new detection information is obtained. Normally, the target motion analysis device 3 performs position localization and motion analysis of the target using this temporal change in the target existence region.

When the sensor 1 loses and finds the target due to the influence of the marine environment, the sensor 1 sends lost-and-find status information (status information indicating that the target has been lost) to the target motion analysis device 3. Upon receiving this information, the target motion analysis device 3 changes the display format (for example, from a solid line to a broken line) of the target existing region displayed on the display device 6 as shown at the right end of FIG. 2(a). The display is changed to the target existing area, and the storage device 4 is controlled to store lost detection information (missed detection time, detection information immediately before lost detection, target existing area at that time, etc.). When detection and misdetection are repeated, the target existence area at the time of misdetection is defined for each misdetection, and is stored in the storage device 4 as described above. Figure 2(b).

(C) shows a display example of a detectable area of another type of sensor and a target existence area, and each right end shows an example of display of each target existence area. This allows the operator to easily recognize that the sensor 1 has lost sight of the target, and to determine the best way to use the sensor 1 and others for re-detection.

In addition, by reading the lost-find information stored in the storage device 4 by operating the input device 5 when necessary, it can be displayed in chronological order as shown in FIG. Motion parameters such as course and speed can be estimated.

Next, the flow of processing will be explained using the flowchart shown in FIG. In this device, in order to understand the detection ability (detectable area) of sensor 1, first, the prediction device 2 acquires information such as the marine environment from the sensor, and the prediction parameters (salt concentration, etc.) are input from the input device. Based on this, water survey predictions (understanding the propagation status of sound waves in water) will be carried out.

When sensor 1 conducts a search and detects a target, based on the sensor's detectable area and detection information (azimuth, azimuth width),
In addition to setting the target's existence area, it also sets the course and speed of the target. At the same time, the detection information is memorized. In addition, when sensor 1 loses and finds the target, it converts the target existence area to 'irymt1 area display based on the lost and found information from sensor 1 (status information indicating that the target has been lost and found), and After memorizing the search information, the search begins again.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, even if the target search sensor loses sight of the target, the operator can easily recognize the area where the previous or past target exists on the display device. The best way to use target search sensors and other equipment for re-detection can be quickly determined, and the effect is significant.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a target search device used in an embodiment of the target area display method according to the present invention, FIG. 2 is an explanatory diagram of the target area display, and FIG. FIG. 4, which is an explanatory diagram of the time-series display of the existence area, is the same flowchart. 1...Target search sensor, 2...Prediction device, 3...
- Target motion analysis device, 4... storage device, 5... input device, 6... display device. Figure 2 - Figure 3 <81 1 given 1jl

Claims (1)

[Claims] 1. Determine the target existence area from the detection information of the target search sensor and the detection capability of the target sensor previously determined by the prediction device, and perform position localization and motion analysis for the desired target. At the same time, the detection information is memorized,
When the target search sensor loses the target, the target area display method converts the target area based on the detection information immediately before the sensor loses the target into a display format different from that used at the time of detection. 2. A target existing area display method according to claim 1, which displays past target existing areas in chronological order before being lost.