JP2003114267A - Suspicious object detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly detect a suspicious object on which an electric wave beacon is mounted in a search area. SOLUTION: A direction finder 1 detects an object (a ship or a suspicious object) in a search sea area, which transmits electric waves. Besides, a radar device 2 searches the object in the search sea area. The suspicious object floats with only an antenna stretched out from the sea level to be hardly found from a monitoring boat. A suspicious object determination part 7 determines that an object remaining after eliminating objects detected by the radar device 2 from objects detected by the direction finder 1 is a suspicious object.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspicious object detection device, and more particularly to a device for detecting an object (suspicious object) that is dropped on a water surface and has a radio wave marker attached thereto.

[0002]

2. Description of the Related Art When a large amount of embargoed products such as stimulants are smuggled from overseas, ships are often used as transportation means. In the past, ship crew members often carried it or hid it in the cargo and carried out smuggling, but with the maintenance of inspection equipment, detection dogs, etc. at port facilities, smuggling by such methods was carried out. If so, it has come to be possible to prevent it.

[0003] Therefore, a smuggler who has carried in from abroad to domestic seas puts the smuggled goods in a floating body (for example, a fishing buoy) equipped with a radio wave signal in the bay or on the coast before berthing at the wharf of a ship and puts it on the water surface. There has been an increasing number of methods in which a smuggler who has dropped on the domestic side and detected it by a radio wave detector mounted on a small boat such as a motor boat and collects it.

As described above, in the method of dropping a smuggled product on the surface of the water, since the radio wave data from the suspicious object is not known, the suspicious object is detected only by visual inspection.

[0005]

However, since the search area for detecting suspicious objects is wide, it is almost difficult to recover the suspicious objects before the smuggler who knows the radio wave specifications. . Therefore, the smuggler who knew the radio wave specifications had to be followed and seized at the scene. If the tail was detected, it was difficult to find the suspicious object.

The present invention has been made to solve the above problems, and an object thereof is to provide a suspicious object detection device capable of promptly detecting a suspicious object having a radio wave signal attached in a search area. To provide.

[0007]

In order to achieve the above object, a suspicious object detection device according to the present invention comprises a radio wave transmitting object detecting means for detecting an object emitting a radio wave in a search area. Detecting a suspicious object by comparing object detection means for detecting an object existing in the search area with information about the object detected by the radio wave transmission object detection means and information about the object detected by the object detection means And a suspicious object determining means, wherein the suspicious object determining means determines the remaining objects, excluding the objects detected by the object detecting means from the objects detected by the radio wave transmitting object detecting means, as suspicious objects. is there.

Further, the object detecting means is assumed to be a radar device or an infrared image pickup device.

A suspicious object detection device according to another invention is
Information on the radio wave characteristics of the radio wave transmitting object detection means that detects the object that emits radio waves in the search area and that measures the radio wave characteristics of the detected object and the radio wave output equipment used in the search area. A suspicious object by comparing the confirmed object information storage means to be stored with the radio characteristic of the object detected by the radio wave transmitting object detection means and the electric characteristic of the radio wave output device stored in the confirmed object information storage means. And a suspicious object determination unit that excludes an object mounted with a radio wave output device stored in the confirmed object information storage unit from an object detected by the radio wave transmission object detection unit. The remaining objects are judged to be suspicious objects.

Further, it is intended to detect a suspicious object floating on the water surface in the search area.

Further, it has a chart display means for displaying the floating position of the detected suspicious object and the tidal current in the search area.

It is also mounted on a ship that searches for suspicious objects in the search area.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1. FIG. 1 is a block configuration diagram showing a first embodiment of a suspicious object detection device according to the present invention. The suspicious object detection device according to the present embodiment includes a direction finder 1, a radar device 2, and an information processing device 3.
The direction finder 1 includes an antenna 4, a broadband receiver 5 that receives radio waves transmitted in the search area, and a direction finder 6 that detects a floating object on the water surface, and emits radio waves in the search area. It is provided as a radio wave transmitting object detecting means for detecting a moving object. Radar device 2
Is provided as an object detecting means for detecting an object existing in the search sea area. Direction finder 1 and radar device 2
The information processing device 3 to which is connected has a suspicious object determination unit 7 and a nautical chart display unit 8. The suspicious object determination unit 7 inputs information detected by the direction finder 1 and the radar device 2 to detect a suspicious object. The nautical chart display unit 8 displays the floating position of the suspicious object detected by the suspicious object determination unit 7 and the tidal current in the search area on the display 9.

FIG. 2 shows a surveillance boat 10, a ship 11 that sails in the search area, and a floating body 12 that contains smuggled goods. The ship 11 is usually equipped with a radio wave output device such as a radio communication device whose radio wave characteristic is known,
A radio wave marker whose radio wave characteristic is unknown on the monitoring side is attached to the floating body 12. The surveillance boat 10 is equipped with the suspicious object detection device shown in FIG. 1, and an object floating on the water surface in the search sea area, that is, the ship 11 and the floating body 12, is transmitted by using this device. Radio waves are received, and the floating body (suspicious object) 12 is searched based on the received radio waves.

The feature of this embodiment is that a suspicious object is detected by comparing the information about the object detected by the direction finder 1 with the information about the object confirmed by the radar device 2 in the search sea area. That is what I did. Hereinafter, the suspicious object detection processing, which is a characteristic of the present embodiment, will be described with reference to the flowchart shown in FIG.

First, in the surveillance boat 10, the direction finder 1
Receives radio waves transmitted from the surface of the water in the search area,
Radio wave parameters such as arrival time, arrival direction, frequency, pulse width, and received power of the received radio wave are measured (step 10).
1). That is, the direction finder 1 detects the ship 11 and the floating body 12 in the search sea area that emits radio waves, and measures the radio wave characteristics of the radio waves emitted by each. At the same time, the radar device 2 searches for an object in the search sea area (step 102). Here, the suspicious object determination unit 7 determines and detects the suspicious object by comparing the information about the object detected by the direction finder 1 and the information about the object detected by the radar device 2 (step 1).
03).

In order to make it difficult to find out from the surveillance boat 10, the floating body 12 equipped with smuggled goods or the like is usually floating with only the antenna 13 protruding from the water surface. For this reason, it does not appear in the radar image like the ship 11, or it appears small.
Therefore, among the objects that the direction finder 1 recognizes as a radio wave source, an object that is not captured by the radar device 2 or an object that is projected on a radar image but is too small to be recognized as the ship 11 is suspicious. Judge as a thing. That is, the suspicious object determination unit 7 determines that the remaining objects, excluding the objects detected by the radar device 2, from the objects detected by the direction finder 1 are suspicious objects. In this way, the suspicious object and its floating position can be automatically acquired. Although the arrival angle of the radio wave from the suspicious object is known, the position cannot be specified unless the distance is reflected on the radar. Therefore, the monitoring boat 1
The radio wave from the floating body 12 that is determined to be a suspicious object is measured by moving 0 in a short time. Thereby, the position can be specified. These measurements can be automatically carried out by a crew other than the maneuvering of the surveillance boat 10 without the need of a crew member.

The chart display unit 8 displays the floating position of the suspicious object 12 detected by the suspicious object determination unit 7 on the nautical chart (step 104). By the way, since it is expected that weak transmission power is intentionally used for the floating body 12 that is determined to be a suspicious object, it may be possible to detect it unless the distance from the suspicious object is short. Therefore, in order to predict the flow of the floating body 12 and bring the floating body 12 closer to each other in a short time, the tide flow in the search sea area is displayed on the display 9 together with the floating body 12. The tidal current in the bay or in the near sea can be estimated by regular observation data and measurement at that time. As a result, the monitoring boat 10
With reference to the displayed nautical chart, it is possible to search along the flow of the tide and reach the floating body 12 in a short time.

In the above description, the radar device 2 is mounted on the surveillance boat 10 as the object detecting means, but an infrared imaging device may be used instead of the radar device.

Embodiment 2. In the first embodiment, unlike the floating body 12, the ship 11 in the search sea area is an object whose navigation position can be confirmed by the radar device 2, so that the direction finder 1 can detect an object that can be detected by the radar device 2.
The suspicious object can be automatically detected by excluding it from the objects detected by.

On the other hand, in this embodiment, the ship 11 is not measured by the actual position measurement by the radar device 2.
It is characterized in that suspicious objects are detected based on the information on the radio wave characteristics of the radio wave output device mounted on the.

FIG. 4 is a block diagram showing a suspicious object detection device according to this embodiment. The same components as those in the first embodiment will be assigned the same reference numerals and explanations thereof will be omitted. In the present embodiment, the radio wave characteristic database 14 is provided instead of the radar device 2. The radio wave characteristic database 14 stores information on the radio wave characteristics of the radio wave output device used in the ship 11 that is sailing in the search sea area. Note that the radio wave characteristics of the suspicious object are not known to the database and, of course, are not registered in the database. The database management unit 15 performs data management such as registration and deletion of information regarding the radio wave characteristic of the radio wave output device with respect to the radio wave characteristic database 14.

The suspicious object detection processing in this embodiment is
Do the following:

First, the information on the radio wave characteristics of the radio wave output device mounted on the ship 11 which is scheduled to travel in the search sea area is registered in the radio wave characteristic database 14 before navigation.

In the surveillance boat 10, the direction finder 1 detects the ship 11 and the floating body 12 in the search sea area which are transmitting radio waves as in the case of the first embodiment, and the radio waves of the radio waves emitted by them are detected. Measure the characteristics.

Here, the suspicious object determination unit 7 is the direction finder 1
Checks whether or not the radio wave characteristic information of the object detected and measured by is registered in the radio wave characteristic database 14. if,
If registered, the object detected by the direction finder 1 can be determined to be the ship 11. On the other hand, if it is not registered, it can be determined that the received radio wave is emitted from the floating body 12. Therefore, when the radio wave characteristic measured by the direction finder 1 is not registered in the radio wave characteristic database 14, the suspicious object determination unit 7 determines an object having the radio wave characteristic as a suspicious object. Then, the determination result is used in the first embodiment.
Is displayed on the display 9 in the same manner as.

As described above, according to this embodiment, a suspicious object can be detected easily and quickly even if the radar device 2 is not mounted.

When the suspicious item is a smuggled product, it is desired that the suspicious item be collected earlier than the smuggler who knows the radio wave characteristics of the suspicious item. For that purpose, it is necessary to detect the suspicious object earlier, but according to the present embodiment, it is possible to detect the suspicious object quickly as described above. Further, even if the suspicious object can be detected, the suspicious object must arrive earlier. Therefore, according to the present embodiment, the tide can be displayed as described above so that the suspicious object can be reached earlier. Further, in order to arrive earlier, it is desirable to use a small boat with good mobility as the monitoring boat 10, but in the configuration of the present embodiment, the processing functions of the suspicious object determination unit 7 and the nautical chart display unit 8 are provided. Since it is only necessary to install an application that exerts the above-mentioned effect on the general-purpose information processing device 3, it is possible to install it on a small vessel without any problem. Also, even if the search area is wide, one surveillance boat can detect suspicious objects.

In this embodiment, the case of detecting a suspicious object floating on the surface of water has been described as an example, but the present invention is not limited to the surface of water, and for example, movement that freely moves on the ground. It can also be applied to the case of detecting the body.

[0031]

According to the present invention, the detection of a suspicious object can be performed quickly and easily by comparing the information relating to the objects detected by the radio wave transmitting object detecting means and the object detecting means.
It can also be done automatically.

Further, the suspicious object can be detected quickly and easily by comparing the electric wave characteristic of the object detected by the electric wave transmitting object detection means with the electric characteristic of the electric wave output device stored in the confirmed object information storage means. , Can also be done automatically.

Further, since the nautical chart display means is provided to display the tidal current, it is possible to reach an object determined to be a suspicious object along the tidal current in a shorter time.

Further, by mounting it on a ship that searches for suspicious objects in the search area, a smuggler puts a contraband in a floating body and drops it on the surface of water, and a smuggler who waits on the domestic side for such as a motor boat. When attempting smuggling by detecting and collecting with a radio wave detector etc. mounted on a small vessel, the smuggled goods (suspicious goods) can be collected earlier than the smuggler. This can prevent smuggling.

[Brief description of drawings]

FIG. 1 is a first embodiment of a suspicious object detection device according to the present invention.
It is a block configuration diagram showing.

FIG. 2 is a conceptual diagram showing a surveillance boat, a ship and a floating body located in a search sea area in the present embodiment.

FIG. 3 is a flowchart showing a suspicious object detection process according to the first embodiment.

FIG. 4 is a second embodiment of the suspicious object detection device according to the present invention.
It is a block configuration diagram showing.

[Explanation of symbols]

1 direction finder, 2 radar device, 3 information processing device,
4, 13 antennas, 5 broadband receivers, 6 direction detectors, 7 suspicious object determination unit, 8 nautical chart display unit, 9 display, 10 surveillance boats, 11 ships, 12 floating bodies (suspicious objects), 14 radio wave characteristic database, 15 Database management department.

Claims (6)

[Claims] 1. A radio wave transmitting object detecting means for detecting an object emitting a radio wave in the search area, an object detecting means for detecting an object existing in the search area, and the radio wave transmitting object detecting means. A suspicious object determination unit that determines a suspicious object by comparing information about the object and information about the object detected by the object detection unit, wherein the suspicious object determination unit is detected by the radio wave transmission object detection unit. A suspicious object detection device, characterized in that the remaining objects, excluding the objects detected by the object detection means, are judged as suspicious objects. 2. The suspicious object detection device according to claim 1, wherein the object detection means is a radar device or an infrared imaging device. 3. A radio wave transmitting object detecting means for detecting an object transmitting a radio wave in the search area and measuring a radio wave characteristic transmitted by the detected object, and a radio wave output device used in the search area. Compared with the confirmed object information storage means for storing information on the radio wave characteristics, the electric wave characteristics of the object detected by the radio wave transmission object detection means and the electric characteristics of the radio wave output device stored in the confirmed object information storage means. And a suspicious object determination means for determining a suspicious object by performing the suspicious object determination means, wherein the suspicious object determination means outputs the radio wave output stored in the confirmed object information storage means from the object detected by the radio wave transmitting object detection means. A suspicious object detection device characterized by determining the remaining objects excluding the objects mounted on the device as suspicious objects. 4. The suspicious object detection device according to claim 1, which detects suspicious objects floating on the water surface in the search area. 5. The suspicious object detection device according to claim 4, further comprising nautical chart display means for displaying the floating position of the detected suspicious object and the tidal current in the search area. 6. The suspicious object detection device according to claim 1, which is mounted on a ship that searches for suspicious objects in a search area.