JPS5840709B2 - Sekigaisen Niyorukou Kokansei Houshiki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an infrared control system suitable for controlling ships navigating along the coast, particularly in narrow waterways.

Conventionally, when ships are navigating, a receiver equipped on each ship receives radio waves transmitted from multiple transmitting stations on land, and the ship's position is determined from the phase difference of the received electrical connection, and the ship's position is determined based on the phase difference between the received electrical contacts. whether each ship has the following conditions:
Alternatively, they used radar to determine the distance from the coast and the distance to other ships to determine whether or not they were on the correct route.

However, with the former method, only the position of self-sufficiency can be determined, and the accuracy of the positioning is relatively low, so it is difficult to use the method in places such as narrow channels where ships are mixed together and in weather conditions where visibility is poor. However, the latter method is not sufficient for safe navigation, and the equipment required for the latter method is expensive.
It is impossible to equip a small fishing boat with such a device, and it also has the disadvantage that it is not easy to identify the vessel from land.

In any case, these methods do not allow unified navigation control, and the current situation is that there is no system that can perform unified navigation control without placing a burden on each ship.

The present invention has been made in view of the above circumstances, and its purpose is to use ground equipment to confirm and identify the position of each ship navigating through a control area, without placing almost any economic burden on each ship. It is an object of the present invention to provide an infrared navigation control system that is easy to implement, economical, and particularly suitable for navigation control in narrow waterways where large and small ships are crowded.

To achieve the above object, the present invention is characterized by equipping each ship with a rotating reflector, installing an infrared transmitter on land that sweeps an infrared beam signal horizontally across a desired controlled area,
Each of the rotating reflectors is rotated at a unique rotation speed predetermined for each of the ships, and the infrared beam signal is intermittent or intensity-modulated by each of the rotating reflectors, and the reflected signal is received. This is an infrared navigation control system in which the position of each ship is confirmed and identified from the received infrared signals, and control instructions are given to each ship using radio equipment.

The method of the present invention will be explained in detail below with reference to the drawings.

FIG. 1 shows a system diagram of a control device 10 according to the method of the present invention, and as shown in FIG.
This system controls the ships 2 and 3 so that they navigate the appropriate routes A and B, respectively.

The control device 10 is a shipboard device 20 installed on each ship.
．． 30, monitoring stations 40, 50 installed at each monitoring station 4, 5, 6, and information on each ship from each monitoring station, which are installed as appropriate on the coast of the narrow waterway 1 to monitor designated sea areas. and a control device 70 installed at a control center 7 that collects and processes the information and gives appropriate control instructions to each ship.

The onboard device 20 is connected to a rotating reflector 21 and a radio receiving device 22, and in the illustrated embodiment, the rotating reflector 21 has four corner cube reflectors on the outer peripheral surface of a cylindrical housing, as shown in FIG. It is a corner cube reflector equipped with mirrors 21a to 21d (only two of which are visible in Figure 3), and each of these reflectors receives infrared signals from each monitoring station, which will be described in detail later. It is designed to ensure that it is sent back in the direction it came from.

For this reason, it is difficult for the vehicle to install the rotating reflector 21 in a place where it can be seen clearly, such as on the deck or on the mast.

The rotating reflector 21 is driven by a rotating drive mechanism at a unique rotation speed predetermined for each ship in order to forcibly modulate the incoming infrared signal at a frequency unique to that ship and reflect it. It is rotated around its axis.

The onboard device 30 also consists of a rotating reflector 31 and a radio receiving device 32, which are exactly the same.

The monitoring device 40 includes an infrared emitting device 41 that sweeps a predetermined control area in the horizontal direction while generating an infrared signal, in this embodiment, a repeated infrared pulse signal with sharp horizontal directionality, and this infrared emitting device. 41 is modulated and reflected by each rotating reflector, and a receiving device 42 is provided for receiving a reflected signal returned to the transmission point.

As shown in FIG. 4, the transmitting optical system device 41a of the emitting device 41 and the receiving optical system device 42a of the receiving device 42 are incorporated into one housing 43, and the transmitting optical system device 41a of the transmitting optical system device The tube 11i is provided so that the directivity of the receiving optical system device 41a and the receiving optical system device 42a are approximately the same.
Sweeping the area.

Therefore, the reflected signal due to the infrared signal emitted from the transmitting optical system device 41a can be reliably stimulated by the receiving optical system device 42a.

The control device 40 further includes a distance calculator 44 for measuring the distance from the time difference between the transmitted signal and the received signal;
4 and a wireless transmitter 45 for transmitting monitoring data obtained at the monitoring station to the control center.

Since the monitoring devices in the other monitoring stations 5 are completely similar, the same reference numerals in the 50s are given to the members corresponding to the husband and husband, and the explanation thereof will be omitted.

Also, the equipment at the monitoring station 6 is omitted. Is the control device 70 a receiving device that receives data from each monitoring station? 1,72. ... and a processor 75 for processing the information obtained from these and inputting it to a display device 74 that displays this data.
It is equipped with

At each monitoring station, each monitoring device sends a predetermined monitoring area 4a, 5a+, and 6a to an infrared beam transmission signal St4.
t St5 s St6 (second
(see figure).

FIG. 5a shows a transmission signal St4 from the monitoring device 40, which is transmitted as a repetitive pulse signal having a predetermined period T and a predetermined width W.

This transmission signal St4 is reflected by the rotating reflector 21 of the ship 2 navigating within the monitoring area.

As is well known, since the rotating reflector always reflects its reflected signal toward the emission point of the incident signal, this reflected signal can be reliably received by the receiving optical system device 42a of the monitoring device 40.

This reflected received signal Sr4 has a time delay tr required for transmission from the observation station 4 to the distance D2, which is twice the distance D2 from the ship 2 trenches.
and as already mentioned, due to the rotation of the rotating reflector 21, the frequency f corresponding to the rotation speed of the rotating reflector 21 is received.
It receives amplitude modulation with the 2 signal and returns.

Therefore, the distance 1 distance calculator 44 calculates the time+'cffi t 1
The distance D2 from the time delay tr, which is the difference between and t2
can be determined from the emission direction of the transmitted signal at that time,
The angle θ2 from the ship's location direction, that is, the reference direction, can be known, and if the reflector rotation speed is specified for each ship, the modulation frequency f2 corresponding to the above rotation speed of the received signal can be measured by a frequency meter (not shown). By doing so, the vessel can be identified.

That is, it is possible to identify the vessel 2 and know its location.

Therefore, the narrower the horizontal beam width of the transmitted signal, the higher the accuracy.

Although the case where only one ship is navigating within a predetermined sea area has been described here, data on ships navigating within the monitored sea area can be obtained in exactly the same manner even if there are multiple vessels.

Furthermore, data on ships navigating in other monitoring areas can be obtained in exactly the same way.

Data from each of these monitoring stations is sent to the control center 7 as an electrical signal via ψ11.

Here, the control device 70 processes the collected data to identify the vessel in the sea area to be controlled and to grasp its position.

Therefore, the control center can give appropriate control instructions to each predetermined ship using, for example, the radio transmitter 76, for ships sailing off the predetermined route or ships sailing abnormally close to each other.

This control instruction is received by the onboard radio receiving devices 22, 32.

Note that this wireless receiving device can be used for general communication purposes.

The signal to be instructed may be transmitted using light, such as visible light, that can be easily distinguished from the infrared rays emitted by the infrared signal emitting device.

In the above embodiment, a case where a plurality of observation stations are installed is explained, but in places where the power of the transmitted signal is increased or the sea area to be controlled is relatively narrow, there may be only one observation station, and in this case, the control center is This is not necessary, and direct control instructions can be given to each vessel from this observation post.

Furthermore, if the controlled sea area is wide, it goes without saying that the number of observation stations may be increased to a desired number.

Further, in the above description, a case has been described in which the rotating reflector is provided with four rotating reflectors on the outer peripheral surface of the cylindrical body, but it goes without saying that at least one rotating reflector may be provided.

In some cases, a simple rotating mirror may be used.

According to the method of the present invention, as described above, each ship only needs to have a rotating reflector and a receiving device for receiving control commands, and this receiving device is not required for ships that are already equipped with a wireless communication device for ship communication. Since the onboard equipment is extremely inexpensive, the economic burden on each ship is light, and since infrared rays are used as a signal, the signal has good transparency and is sufficient even in weather such as rain and fog. Since it can be used as an all-weather control system, it can be used as an all-weather control system.

[Brief explanation of drawings]

FIG. 1 is a schematic system diagram of a control system according to the method of the present invention, FIG. 2 is a diagram showing the deployment state of the system in FIG. 1, and FIG.
The figure is a perspective view of the rotating reflector, FIG. 4 is an external view of the infrared transmitting device, and FIGS. 5a and 5b are waveform diagrams of transmission signals, respectively. 2.3... Ship, 21, 31... Rotating reflector, 22/32゛°°″°° Radio receiving device, 41.
51... Infrared emitting device, 41a, 51a...
...Transmission optical system, 42a, 52a...Reception optical system, 44.54...Distance calculator, 76...
...Wireless transmitter.

Claims (1)

[Claims] 1 Each ship is equipped with a rotating reflector, and an infrared signal emitting device is installed on land that emits an infrared signal beam in a sweeping manner over the desired control area, and the rotating reflector is installed in advance for each ship or group of ships. It rotates at a predetermined number of rotations, receives the reflected signal of the infrared signal beam from each of the rotating reflectors, and confirms and identifies the position of each ship from the received infrared signal, and provides the required information to each ship. A navigation control method using infrared rays, which is characterized by giving control instructions.