JP2013113605A - Radar communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radar communication device which rotationally drives an antenna, and is capable of transmitting communication data to an other ship.SOLUTION: A radar communication device 10 includes a radar transmission/reception section 14 for transmitting/receiving a radar wave, and a communication transmission/reception section 18 for transmitting/receiving communication data. The radar communication device 10 communicates with an other ship in which an antenna rotates by synthesizing the communication data with the radar wave and transmitting/receiving it, and includes: a motor control section 52 which controls a motor for rotationally driving an antenna of own ship; and a radar control section 26 which acquires a true azimuth θt of the other ship, calculates a rotation cycle T of an antenna of the other ship, and calculates a facing time t which is a time when a true azimuth θs of the antenna of the own ship faces to the antenna of the other ship. The motor control section 52 places the antenna of the own ship on standby in a position in which the true azimuth θs of the antenna of the own ship matches the true azimuth θt of the other ship before the facing time t calculated by the radar control section 26, and the communication transmission/reception section 18 communicates with the other ship.

Description

  The present invention includes a radar transmission / reception unit that transmits / receives radar waves and a communication transmission / reception unit that transmits / receives communication data, and combines the communication data with the radar waves to transmit / receive the radar communication to communicate with other ships. Relates to the device.

  Conventionally, in order for ships to communicate with each other, a communication device is mounted in addition to the radar device. When the ship is a merchant ship, an international VHF wireless device, an Inmarsat satellite communication device or the like is mounted as a communication device, and when the ship is a small fishing boat, an SSB wireless device or the like is mounted as a communication device. Therefore, since the communication apparatus of a merchant ship and a small fishing boat differs, it was not able to communicate between both ships. In order to realize communication between ships having different communication devices, a communication method between ships has been studied.

  Patent Document 1 discloses a communication device that synthesizes communication data with a radar wave and communicates between ships using a radar device.

JP 2010-8069 A

  In the communication device described in Patent Literature 1, the receiving ship stops the rotation of the antenna and receives communication data. Therefore, the receiving ship cannot detect the target by the radar because the antenna is stopped while receiving the communication data. In addition, since the horizontal beam width of the antenna used in the communication device described in Patent Document 1 is very narrow, 1 to 5 degrees, communication data is transmitted and received if the own antenna and the other ship do not face each other. There is a bug that can not be.

  The present invention has been made in consideration of the above-described problems, and an object thereof is to provide a radar communication device that can communicate with a ship of another ship whose antenna is rotating.

  A radar communication apparatus according to the present invention includes a radar transmission / reception unit that transmits / receives radar waves and a communication transmission / reception unit that transmits / receives communication data. By combining the communication data with the radar waves and transmitting / receiving the antenna, A radar communication device that communicates with a rotating other ship, based on a motor control unit that controls a motor that rotates an antenna of the ship, and a reflected wave by the other ship with respect to the radar wave transmitted from the ship The true direction of the other ship with respect to the own ship is acquired, the rotation period of the antenna of the other ship is calculated based on the radar wave transmitted from the other ship, and the other ship is calculated based on the rotation period. A radar control unit that calculates a facing time when the aerial line of the ship faces the aerial line of the ship, and the motor control unit rotates the aerial line of the ship, and the radar control unit By the issued facing time, the true direction of the own ship's aerial line is made to wait at a position where it matches the true direction of the other ship, and the communication transmitting / receiving unit communicates with the other ship at the facing time It is characterized by that.

  In the radar communication device, an encoder that detects a relative direction of the antenna with respect to a direction of the bow of the ship, a bow direction detection unit that detects the bow direction of the ship, and a relative direction detected by the encoder; An azimuth calculating unit that calculates a true azimuth of the aerial line of the ship based on the bow azimuth detected by the bow azimuth detecting unit, and the motor control unit rotates the aerial line of the own ship. , And waiting at a position where the true direction of the aerial line of the own ship coincides with the true direction of the other ship.

  According to the radar communication device of the present invention, it is possible to communicate with the other ship at which the aerial line rotates and the other ship at the facing time. Further, the waiting time for data communication can be shortened by acquiring the facing time when the aerial lines of the own ship and the other ship face each other and making the aerial line of the own ship face each other for each rotation of the aerial line of the other ship. . Furthermore, the ship on the transmission side and the reception side can detect the target by the radar even during data communication without stopping the antenna.

It is explanatory drawing of the radar communication apparatus which concerns on embodiment of this invention. It is explanatory drawing about the direction of the aerial line of own ship and other ships. It is explanatory drawing about the procedure of the data communication by a radar communication apparatus.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of a radar communication device 10 according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of the direction of an aerial line between the own ship and another ship, and FIG. It is explanatory drawing about the procedure of data communication.

  The radar communication device 10 includes a radar instruction unit 12, a radar transmission / reception unit 14, a communication operation unit 16, a communication transmission / reception unit 18, an antenna driver 20, a gyrocompass (heading direction detection unit) 22, and an antenna 24. Is provided.

  The radar instruction unit 12 is an operation unit that is operated to detect other ships by transmitting and receiving radar waves, and includes a display unit (not shown) that displays the detected other ships.

  The radar transmission / reception unit 14 combines a radar control unit 26 that controls transmission / reception of radar waves, a radar transmission unit 28 that transmits radar waves as transmission signals, a circulator 30 that is a three-port circulator, and radar waves and communication data. A synthesizer 32, a diode limiter 34, and a radar receiver 36 that receives the reflected wave as a reflected signal. The diode limiter 34 is provided in order to protect the radar receiver 36 from transmission power at the time of transmission of radar waves.

  The communication operation unit 16 is an operation unit that performs an operation for transmitting and receiving communication data in the communication transmission / reception unit 18, and includes a display unit (not shown) that displays the communication data.

  The communication transmitting / receiving unit 18 receives communication data, a communication control unit 38 that controls transmission / reception of communication data, a communication data transmission unit 40 that transmits communication data, a circulator 42 that is a three-port circulator, a diode limiter 44, and the like. And a communication data receiving unit 46. Similar to the diode limiter 34, the diode limiter 44 is provided to protect the communication data receiving unit 46 from transmission power during transmission of radar waves.

  The antenna driver 20 includes a rotary joint 48 that rotatably supports the antenna 24, a motor 50 that rotationally drives the antenna 24 via the rotary joint 48, a motor controller 52 that controls driving of the motor 50, and data communication A rotation signal control unit 54 that controls the rotation signal to perform the operation, an encoder 56 that detects a relative direction of the antenna 24 with respect to the bow direction of the ship as rotation angle information of the antenna 24, and a direction that calculates the true direction of the antenna 24 And an arithmetic unit 58. The gyro compass 22 detects the heading of the ship.

  The antenna 24 is a directional antenna with a narrow horizontal beam width, and the horizontal beam width is about 1 to 5 degrees.

  Next, a data communication procedure by the radar communication device 10 will be described.

  The radar communication device 10 first detects other ships that are communication targets around the ship (step S1). An instruction signal for detecting other ships around the ship is supplied from the communication operation unit 16 to the radar control unit 26 via the communication control unit 38. The radar control unit 26 supplies an instruction signal for rotationally driving the antenna 24 to the motor control unit 52, and the motor 50 is driven by an instruction from the motor control unit 52, so that the antenna 24 rotates through the rotary joint 48. The radar transmission unit 28 generates a transmission signal to be transmitted as a radar wave, and the transmission signal is supplied to the antenna 24 via the circulator 30, the synthesis unit 32, and the rotary joint 48, and is radiated from the antenna 24 as a radar wave. . At this time, the encoder 56 detects the relative azimuth of the antenna 24 with respect to the bow direction of the ship as rotation angle information, generates a rotation synchronization signal based on the rotation angle information, and supplies it to the radar control unit 26.

  The emitted radar wave is reflected by a target including another ship, and the reflected wave is received by the antenna 24. The received reflected wave is supplied as a reflected signal to the radar receiver 36 via the rotary joint 48, the synthesizer 32, the circulator 30, and the diode limiter 34. The radar receiver 36 processes the reflected signal to convert it into a video display signal and supplies it to the radar controller 26. The radar control unit 26 supplies the rotation synchronization signal and the video display signal to the radar instruction unit 12, and the position of the target including other ships is displayed on the display unit of the radar instruction unit 12.

  Next, preparations for communication between the ship and other ships are made. In response to an instruction from the communication control unit 38 to the radar control unit 26, another ship to be communicated is specified on the display unit of the radar instruction unit 12. The radar control unit 26 acquires the other ship direction θt which is the true direction of the other ship as the direction information of the other ship specified from the radar instruction unit 12, and the other ship direction θt is a rotation signal via the communication control unit 38. It supplies to the control part 54 (step S2). The rotation signal control unit 54 supplies the other ship direction θt to the direction calculation unit 58 and instructs the motor control unit 52 via the direction calculation unit 58 so that the aerial line 24 faces in the direction of the other ship direction θt.

  The motor control unit 52 drives the motor 50 to rotate the aerial line 24 to a position where the true direction θs of the aerial line 24 and the other ship direction θt coincide with each other via the rotary joint 48, and the aerial line 24 is rotated at that position for a predetermined time. And wait (step S3). Here, the true orientation θs is calculated as follows. Specifically, the bow direction θa of the ship's bow is detected by the gyrocompass 22, the relative direction θb of the beam of the antenna 24 with respect to the ship's bow is detected by the encoder 56, and the bow direction θa and the relative direction θb are sent to the direction calculation unit 58. Supply. The bearing calculation unit 58 calculates the true bearing θs based on the bow bearing θa and the relative bearing θb. The true orientation θs is calculated as θs = θa + θb. In the following, it is assumed that the azimuth is measured clockwise as shown in FIG.

  Radar waves radiated from other ships are received by the antenna 24, supplied to the radar receiver 36 via the rotary joint 48, the synthesizer 32, the circulator 30, and the diode limiter 34, and subjected to signal processing by the radar receiver 36. It is supplied to the control unit 26. The radar control unit 26 calculates the rotation period of the antenna of the other ship based on the reception time of the radar wave received from the other ship a plurality of times within the predetermined time that the antenna 24 is waiting. The shortest rotation period among the calculated rotation periods is set as the rotation period T of the antenna of the other ship. The radar control unit 26 calculates a facing time t which is a time when the antenna of the other ship is directly facing the antenna 24 based on the reception time and the rotation period T of the radar wave where the electric field intensity of the radar wave is maximum (step). S4). The radar control unit 26 supplies the calculated facing time t and rotation period T to the rotation signal control unit 54 via the communication control unit 38. Here, for example, when the rotational speed of the antenna of the other ship is 20 rpm or more, assuming that the predetermined time during which the antenna 24 is stopped is about 10 seconds, the radar waves are transmitted from the other ship within the predetermined time by 3, 4 The rotation period can be calculated from the reception time of each received radar wave.

  The rotation signal control unit 54 instructs the motor control unit 52 via the azimuth calculation unit 58 so that the aerial line 24 stands by at a position facing the aerial line of the other ship at a time earlier than the facing time t. The motor control unit 52 drives the motor 50 based on the rotation angle corresponding to the other ship direction θt supplied from the rotation signal control unit 54 via the direction calculation unit 58, and rotates the antenna 24 via the rotary joint 48. To wait (step S5). Thereby, the true direction θs of the aerial line 24 coincides with the other ship direction θt, and the aerial line 24 of the own ship and the aerial line of the other ship face each other every rotation period T of the aerial line of the other ship.

  Next, when the aerial line 24 of the own ship and the aerial line of the other ship face each other, communication data is transmitted and received between the own ship and the other ship (step S6). The communication operation unit 16 is operated by the operator, and communication data to be transmitted to another ship is prepared and supplied to the communication control unit 38. The communication control unit 38 supplies the communication data to the communication data transmission unit 40 and supplies the communication data to the synthesis unit 32 via the circulator 42. In the synthesizer 32, a transmission signal is generated in the radar transmitter 28 in accordance with an instruction from the communication controller 38 to the radar controller 26, and is supplied to the synthesizer 32 via the circulator 30. In the combining unit 32, the supplied transmission signal and the communication signal including the communication data are combined and radiated as a radar wave from the antenna 24 via the rotary joint 48.

  A communication signal including communication data transmitted from another ship is received by the antenna 24, received by the communication data receiving unit 46 via the rotary joint 48, the combining unit 32, the circulator 42, and the diode limiter 44. Adjusted and output to the communication operation unit 16 via the communication control unit 38. Communication data from other ships is displayed on the display unit of the communication operation unit 16.

  When the amount of communication data transmitted from the own ship to the other ship is larger than the amount of communication data that can be transmitted by one rotation of the antenna, it is necessary to transmit the communication data again. In such a case, when a communication signal is received from another ship, the time when the radar control unit 26 receives the reflected wave is acquired based on the radar wave included in the communication data, and the rotation signal control unit 54 receives the signal. By supplying, the next facing time t is calculated based on the received time and the rotation period T. Further, the radar control unit 26 acquires the other ship direction θt as the direction information of the other ship specified from the radar instruction unit 12 and supplies the other ship direction θt to the rotation signal control unit 54 via the communication control unit 38. (Step S8). Then, as described above, at a time earlier than the facing time t by a predetermined time, the aerial line 24 stands by at a position facing the aerial line of the other ship (step S5) and communicates with the other ship (step S6). Steps S7, S8, S5, and S6 are repeated until the transmission of the communication data is completed (No in step S7). All communication data to be transmitted from the own ship to the other ship is transmitted, and the communication ends (Yes in step S7).

  Further, in the standby state for detection by radar or communication after transmission of communication data, the rotation signal control unit 54 causes the antenna 24 to rotate synchronously with the rotation period T with respect to the motor control unit 52 via the azimuth calculation unit 58. Instructs the motor control unit 52. Thereby, when the other ship is equipped with the radar communication device, the aerial line 24 and the aerial line of the other ship can be made to face each other at the rotation period T, and communication between ships can be easily performed.

  The radar communication device 10 includes a radar transmission / reception unit 14 that transmits / receives radar waves and a communication transmission / reception unit 18 that transmits / receives communication data, and the antenna is rotated by synthesizing and transmitting the communication data to the radar waves. A device that communicates with the other ship, the motor controller 52 that controls the motor that rotationally drives the ship's antenna, and the true direction θt of the other ship, and the rotation period T of the antenna of the other ship A radar control unit 12 that calculates and calculates a facing time t that is a time when the aerial line θs of the own ship faces the aerial line of the other ship, and the motor control unit 52 The aerial line of the ship is put on standby at a position where the true azimuth θs of the own ship's antenna coincides with the true azimuth θt of the other ship by the facing time t calculated by the radar control unit 26. With the other ship To trust.

  According to the radar communication device 10, it is possible to communicate with the other ship that rotates the antenna with the other ship at the facing time. Moreover, the waiting time of data communication can be shortened by acquiring the facing time t when the aerial lines of the own ship and the other ship face each other and causing the aerial line 24 to face each other for each rotation of the aerial line of the other ship. Furthermore, the ship on the transmission side and the reception side can detect the target by the radar even during data communication without stopping the antenna.

  The radar communication device 10 detects the relative direction of the antenna 24 with respect to the direction of the bow of the ship, the bow direction detection unit 22 that detects the bow direction of the ship, and the encoder 56. An azimuth calculation unit 58 that calculates a true azimuth of the antenna 24 of the ship based on the relative azimuth and the bow azimuth detected by the bow azimuth detection unit, and the motor control unit 54 includes: Then, the aerial line 24 of the own ship is rotated to wait at a position where the true direction of the aerial line 24 of the own ship coincides with the true direction of the other ship.

  It should be noted that the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Radar communication apparatus 12 ... Radar instruction | indication part 14 ... Radar transmission / reception part 16 ... Communication operation part 18 ... Communication transmission / reception part 20 ... Antenna drive part 22 ... Gyrocompass 24 ... Antenna 26 ... Radar control part 28 ... Radar transmission part 30,42 ... circulator 32 ... synthesizer 34 ... diode limiter 36 ... radar receiver 38 ... communication controller 40 ... communication data transmitter 44 ... diode limiter 46 ... communication data receiver 48 ... rotary joint 50 ... motor 52 ... motor controller 54 ... Rotation signal control unit 56... Encoder 58.

Claims (2)

A radar transceiver for transmitting and receiving radar waves;
A communication transceiver unit for transmitting and receiving communication data,
A radar communication device that communicates with another ship in which an antenna rotates by synthesizing the communication data with the radar wave,
A motor control unit that controls a motor that rotates the antenna of the ship;
Based on the reflected wave from the other ship with respect to the radar wave transmitted from the own ship, the true direction of the other ship with respect to the own ship is obtained, and based on the radar wave transmitted from the other ship, the other A radar control unit that calculates a rotation period of the antenna of the ship, and calculates a facing time when the antenna of the other ship directly faces the antenna of the ship, based on the rotation period;
Have
The motor control unit rotates the aerial line of the own ship, and the true direction of the own ship's aerial line coincides with the true direction of the other ship by the facing time calculated by the radar control unit. Wait,
The radar communication apparatus, wherein the communication transmitting / receiving unit communicates with the other ship at the facing time. The radar communication device according to claim 1,
An encoder that detects a relative orientation of the antenna with respect to the direction of the bow of the ship;
A heading detection unit for detecting the heading of the ship;
Based on the relative azimuth detected by the encoder and the bow azimuth detected by the bow azimuth detection unit, an azimuth calculation unit that calculates the true azimuth of the antenna of the ship,
Have
The said motor control part rotates the antenna of the said ship, and makes it stand by in the position where the true azimuth | direction of the own ship's aerial line corresponds with the true azimuth | direction of the said other ship.

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