JP2848366B2 - Buoy transmission radio control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buoy transmission radio control system, and in particular, a plurality of passive sonobuoys and active sonobuoys are deployed on the sea, and the position information of the underwater vehicle is acquired on a sonobuoy carrier. The present invention relates to a buoy transmission radio control system for suppressing interference of RF radio waves transmitted wirelessly to a signal processing device.

[0002]

2. Description of the Related Art Conventionally, when a passive sonobuoy and an active sonobuoy are used in combination to measure the position of a target underwater vehicle such as a submarine, a plurality of passive sonobuoys dropped and deployed from a carrier such as an aircraft are first used. In this method, the approximate position is measured, and then the detailed position is examined with a plurality of active sonobuoys that are dropped and deployed.

[0003] In this way, the position information of the target acquired by the passive sonobuoy and the subsequent active sonobuoy is transmitted in the form of RF radio waves for use in the target position locating by the signal processing device mounted on the carrier. Both passive sonobuoy and active sonobuoy are assigned the same frequency of multiple channels and set in advance,
Moreover, the number of active sonobuoys is significantly smaller than the number of passive sonobuoys.

[0004] Such a difference in the number of operations is that the passive sonobuoy is operated for the purpose of first detection for grasping the existence of a target in a relatively wide area, and is active in so-called pinpointing detection in which the target position is scrutinized after the first detection. In addition to differences in the basic operational purpose of using aircraft, this is based on conditions such as the limit on the number of sonobuoys that can be installed on aircraft normally used as carriers.

As described above, in both the passive sonobuoy and the active sonobuoy, the operating frequency is set before the drop. In addition, since the number of passive sonobuoys deployed in the search stage is much larger than the number of active sonobuoys deployed in the position localization scrutiny stage, the passive sonobuoy and the active sonobuoy have the same frequency unless managed intentionally. Since the sonobuoy is operated and causes interference, the frequency of the sonobuoy in use is recorded and managed so as not to use the sonobuoy of the same frequency.

[0006]

There is a limit to the frequency of the RF radio wave assigned to the passive sonobuoy and the active sonobuoy, and is at most about 20 to 30 channels. In addition, the number of installed aircraft is limited, and the same frequency channel group is assigned to both the passive sonobuoy and the active sonobuoy. Furthermore, the number of active sonobuoys is significantly smaller than the number of passive sonobuoys due to the difference in basic operation purpose between the two sonobuoys.

In the sonobuoy operated under such a background, the active sonobuoy having the same frequency channel as any one of the plurality of passive sonobuoys already dropped must be used, and the passive sonobuoy of the same frequency channel must be successively used. In some cases, an operation situation is unavoidable in which a drop occurs, but in this case, interference occurs, and R
Since it does not have the function of restricting the F radio wave, there is a drawback that target position information cannot be obtained, and therefore, operability is inevitably impaired.

An object of the present invention is to solve the above-mentioned disadvantages,
An object of the present invention is to provide a buoy transmission radio wave control system capable of significantly improving operation efficiency.

[0009]

In order to achieve the above object, the present invention has the following means. In other words, the buoy transmission radio control system of the present invention provides passive information and precise measurement as approximate position information on a plurality of passive sonobuoys operated and deployed at sea from a carrier such as an aircraft or a ship and underwater vehicles captured by active sonobuoys. Active information as position information, in a control system of RF radio waves to be transmitted at a preset frequency to a signal processing device disposed in the carrier, when the active sonobuoy is activated, the active sonobuoy of the same frequency as the passive sonobuoy, the RF First interference elimination means for forcibly suspending the transmission of radio waves and restoring at the end of operation of the active sonobuoy and performing time division operation for eliminating interference due to transmission of the RF radio waves, and passive sonobuoys having the same frequency When using transmitted radio waves, passive sonobu And it has a configuration in which a second interference removing means for suppressing the transmission radio wave sent to eliminate interference.

[0010] The buoy transmission radio control system of the present invention comprises:
A configuration is premised on an operation of acquiring the active information by the active sonobuoy after acquiring the passive information by the passive sonobuoy.

Further, the buoy transmission radio control system of the present invention comprises:
It has a configuration on the premise of operation in which the number of active sonobuoys is limited as compared to the number of passive sonobuoys.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS When a control signal radio wave is transmitted from a sonobuoy carrier, for example, an onboard device as a signal processing device mounted on an aircraft via an antenna, each of passive and active deployed on the sea surface is transmitted. The sonobuoy receives with a receiving antenna and an RF receiver. Initially, when the passive sonobuoy is in the operating state and the active sonobuoy is in the standby state, each sonobuoy receives the identification signal containing the control signal radio wave and receives the subsequent radio control signal when it is the same as its own identification code And analyze.

As a result, the passive sonobuoy turns off the reception of the RF wave and enters a standby state, and the active sonobuoy turns on the reception of the RF wave and becomes active. This state is maintained until the next combination of the identification signal and the radio wave control signal is transmitted from an aircraft or the like, thus controlling the simultaneous transmission of the frequency of the same RF radio wave and preventing interference. It is a basic embodiment of the present invention to avoid the problem and improve the operation efficiency of the sonobuoy.

[0014]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention. The configuration of the embodiment shown in FIG. 1 is an RF radio wave 1 that is mounted on an aircraft A as a carrier to transmit a control signal radio wave 131 and provide target position information from a sonobuoy.
On-board device 18 that receives the C.32 and performs the target location localization process
And a floating portion 13 that constitutes a passive or active sonobuoy that is dropped from the aircraft A and deployed for operation.
The underwater part 14 is suspended from the underwater part 14 and the floating part 13,
And an underwater suspension cable 5 serving as a signal transmission path.

The on-board device 18 includes a control signal transmitting section 19 for transmitting a control signal radio wave 131 as shown in FIG. The levitation 13 is basically composed of the receiving antenna 1, the RF receiver 2, the signal analyzing unit 3 for analyzing the received signal, the signal processing unit 4 for processing the analytic signal, the RF transmitter 11, and the transmitting antenna 12. Be prepared.

The underwater unit 14 transmits a transmission signal to the signal processing unit (2) 6 for controlling the operation state of the underwater unit 14 based on the output of the signal processing unit (1) 4 provided from the floating unit 13. A transmission circuit 7 and a transmitter 8 for receiving the target information, and a receiver 9 and a reception circuit 10 for receiving the target information. When the underwater part 14 is a passive sonobuoy, the transmission circuit 7 and the wave transmitter 8 indicated by broken lines become unnecessary.

In the above-described configuration, the on-board unit 18 having the control signal transmitting unit 19, the floating unit 13, the underwater unit 14, and the underwater suspension cable 5 constitute first and second interference eliminating means.

Next, the operation of this embodiment will be described.
A control signal radio wave 131 for controlling a sonobuoy transmission radio wave is transmitted from the control signal transmitting unit 19 shown in FIG. 2 by the onboard device 18 mounted on the aircraft A. The transmitted control signal radio wave 131 is captured by, for example, the receiving antenna 1 in the floating portion 13 of the active sonobuoy, and is input to the RF receiver 2. As shown in FIG. 4, the control signal radio wave 131 thus input includes an identification signal (1) 20 for identifying the self-sonoy and a radio control signal (1) for controlling the transmission of the RF radio wave from the sonobuoy. 21 and an instruction signal (1) 22 for instructing the operation of the sonobuoy are included. FIG. 4 also includes an identification signal (2) 23 described later.
, The command signal (2) 24, the identification signal (3) 25, and the radio control signal (2) 26 are included in the control signal radio wave 131.

Next, the information of the control signal radio wave 131 is input to the signal analyzer 3. The signal analyzer 3 outputs the identification signal (1)
As shown in FIG. 3, an identification signal detection unit 15 detects whether or not the signal 20 matches its own identification signal, a radio control signal detection unit 16 that detects a radio control signal (1) 21, and its detection. An RF radio wave ON / OFF control unit 17 for turning on or off the transmission of the RF radio wave according to the result is provided. An ON or OFF signal of the RF radio wave is input to the RF transmitter 11 to turn ON or OFF the transmission of the RF radio wave. Control is performed.

Next, ON / O of the transmission of the above-mentioned RF electric wave is described.
The FF control will be described in more detail with reference to FIGS. An identification signal, a radio wave control signal, and a command signal having a configuration as shown in FIG. 4 are transmitted from the aircraft to the sonobuoy as the control signal radio wave 131 (step S1 in FIG. 5).
Sonobuoy is the identification signal for self sonobuoy identification (1)
20 and if this is recognized as its own identification signal (step S2 in FIG. 5), the subsequently transmitted R
The radio control signal (1) 21 for F radio wave transmission control is detected (step S4 in FIG. 5), and the transmission of the RF radio wave is turned off in the passive sonobuoy (step S6 in FIG. 5).
A standby state is set (step S7 in FIG. 5).

On the other hand, when the identification signal is not recognized as its own identification signal, the identification signal is ignored (step S2 in FIG. 5).
1). Similarly, the active sonobuoy also has an identification signal (1).
20 and the radio control signal (1) 21 are received.
The transmission of the radio wave is turned ON (step S8 in FIG. 5), and the operation state is set. The command signal (1) 22 for the operation command transmitted subsequently is analyzed and a predetermined operation is performed (step S9 in FIG. 5). Thereafter, when the identification signal (2) 23 is transmitted, both the passive sonobuoy and the active sonobuoy determine the identification signal (steps S10 and S15 in FIG. 5).

In the case of the passive sonobuoy, if the signal to be transmitted next is not a radio control signal, the standby state is maintained. If the signal is a radio control signal, the transmission of the RF radio wave is turned on and the operation state is shifted (see FIG. 5). Steps S11 to S14).

On the other hand, the active sonobuoy executes the operation of the command signal (2) 24 if the signal to be transmitted next is not a radio control signal (steps S16 to S18 in FIG. 5). If the incoming signal is a radio control signal, the transmission of RF
F and enters a standby state (steps S19 to S2 in FIG. 5).
0). After that, the same operation is repeated, and the control of ON / OFF of the transmission of the RF radio wave is executed.

Returning to FIG. 1, the description of the operation of this embodiment will be continued. A control signal radio wave 131 having the content as shown in FIG. 4 is transmitted from the onboard device 18 of the aircraft A. The active sonobuoy receives this control signal at the RF receiver 2 via the receiving antenna 1 of the levitation 13, and sends the received signal to the signal analyzer 3.

The signal analyzer 3 analyzes the identification signal, the radio control signal, and the command signal included in the control signal. When the radio control signal coincides with its own identification signal and the radio control signal is active for the active sonobuoy, the transmission of the RF radio wave is turned on when the odd number is turned on, and the active state is turned on when the passive sonobuy is even-numbered, and the radio wave control signal is turned on to enter the active state. Time-sharing control is performed as described above.

The command signal of the control signal is amplified by the signal processing section (1) 4 and sent to the underwater section 14 via the cable 5 and supplied to the signal processing section (2) 6 of the underwater section 14. . In the active sonobuoy, this signal is power-amplified by the transmission circuit 7 and drives the transmitter 8 to be transmitted as sound waves into the sea.

The echo of the sound wave transmitted into the sea is received by the receiver 9.
The signal is amplified by the receiving circuit 10 and is transmitted from the signal processing unit (2) 6 to the signal processing unit (1) 4 of the floating unit 13 via the cable 5. Thereafter, the signal processing unit (1) 4
Then, the input signal is waveform-shaped, and the RF transmitter 132 transmits the RF radio wave 132 as a target position measurement signal to the aircraft A via the transmission antenna 12.

The passive sonobuoy performs the same operation,
When the active sonobuoy of the same frequency channel is in operation, that is, when the radio control signal is an odd number of times, the transmission of the RF radio waves is turned off, and the transmitting circuit 7 and the transmitting Is different from the operation of the active sonobuoy, except that the operation is the same as that of the active sonobuoy.

When the passive sonobuoys have to use RF waves of the same frequency channel between the passive sonobuoys, it is necessary to avoid interference with the passive sonobuoy which uses the RF waves of the same frequency channel that is being used first. When the passive sonobuoy is dropped, the identification signal (P) 2 which can be automatically received only by the passive sonobuoy as shown in FIG.
7 to be controlled, and the identification signal (4) 2 to be transmitted subsequently
An operation of permanently turning off the transmission of the RF wave of the passive sonobuoy corresponding to No. 8 is executed, and thereafter, the newly used passive sonobuoy is operated and controlled so that there is no interference at all times.

[0030]

As described above, according to the present invention, the RF for transmitting the position information on the underwater vehicle captured by a plurality of passive sonobuoys deployed on the sea and active sonobuoys to a signal processing device mounted on the sonobuoy carrier. In the control of radio waves, the active sonobuoy of the same frequency channel and the passive sonobuoy RF transmission are alternately performed in a time-division manner, and when the operation of the passive sonobuoy of the same frequency channel cannot be avoided, the passive sonobuoy from the predeployed passive sonobuoy is used. By controlling transmission of transmission radio waves permanently, it is possible to fundamentally eliminate the interference of transmission radio waves with the same frequency when multiple passive sonobuoys and multiple active sonobuoys that use the same frequency channel operate. Has an effect that can be.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of the on-board device 18 of FIG.

FIG. 3 is a block diagram illustrating a configuration of a signal analysis unit 3 of FIG. 1;

FIG. 4 is a diagram showing a comparison between a control signal radio wave 131 and a transmission operation sequence of an RF radio wave 132 in FIG.

FIG. 5 is a flowchart showing the operation of the embodiment of FIG. 1;

FIG. 6 shows the RF of the passive sonobuoy in the embodiment of FIG. 1;
FIG. 4 is a diagram showing a control control signal for controlling a radio wave 132.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 reception antenna 2 RF receiver 3 signal analysis unit 4 signal processing unit (1) 5 cable 6 signal processing unit (2) 7 transmission circuit 8 transmitter 9 receiver 10 reception circuit 11 RF transmitter 12 transmission antenna 13 floating Part 14 Underwater part 18 Onboard equipment 19 Control signal sending part

Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) G01S 3/80-3/86 G01S 5/18-5/30 G01S 7/52-7/64 G01S 15/00-15 / 96

Claims (3)

(57) [Claims] 1. Passive information as rough position information and active information as precise position information on underwater vehicles captured by a plurality of passive sonobuoys and active sonobuoys deployed from the carrier such as an aircraft or a ship to the sea. In the control method of the RF radio wave transmitted at a preset frequency to the signal processing device provided in the carrier, when the active sonobuoy is activated, the transmission of the RF radio wave by the passive sonobuoy having the same frequency as the active sonobuoy is forcibly performed. The first interference elimination means for temporarily stopping and restoring at the end of the operation of the active sonobuoy and performing the time division operation for eliminating the interference due to the transmission of the RF radio wave, and when the passive sonobuoys use transmission radio waves of the same frequency. Has interfered with the transmission of transmitted radio waves of passive sonobuoys A buoy transmission radio wave control system, comprising: a second interference elimination means for suppressing the interference. 2. The buoy transmission radio wave control system according to claim 1, wherein an operation of acquiring the active information by the active sonobuoy after the passive information is acquired by the passive sonobuoy is assumed. 3. The buoy transmission radio wave control system according to claim 1, wherein an operation number of said active sonobuoy is limited as compared with an operation number of said passive sonobuoy.