An integrated control method for underwater frogman formation communication and positioning

Abstract

The present invention discloses an integrated control method for underwater frogman formation communication and positioning. The communication system adopted by this method has a transmitted signal frame structure composed of communication signal + gap + direction-finding signal or direction-finding signal + gap + communication signal, where the communication signal is at least one of voice communication signals, commands, or ranging communication signals, and the communication system divides the working frequency band into a communication signal working frequency band and a direction-finding signal working frequency band. Through the reasonable division of the working frequency band and the special design of the signal frame structure, the present invention can achieve the functions of voice communication, command communication, ranging, and direction-finding for underwater frogmen.

Description

Technical field:

[0001] The present invention relates to the technical field of underwater acoustic communication and underwater acoustic positioning, and in particular to an integrated control method for underwater frogman formation communication and positioning. Background technology:

[0002] Underwater frogman communication equipment can improve the communication efficiency of divers in underwater activities and their ability to respond quickly to emergencies, and has broad application prospects. At present, there are many mature underwater frogman communication products on the market, but these products are basically designed to only realize underwater voice communication, and do not have the functions of underwater command communication or positioning. For some underwater emergencies and fire emergency rescue occasions, if the surface command center can obtain the position of the underwater frogman in real time, or the underwater frogman can obtain the position of other teammates in real time, it will be very beneficial to the development of underwater operations or rescue, and further improve the efficiency of underwater operations. Therefore, how to realize the voice communication, command communication, ranging and direction finding functions of underwater frogmen is a technical problem that needs to be solved urgently. Summary of the invention:

[0003] The technical problem to be solved by the present invention is to provide an integrated control method for underwater frogman formation communication and positioning, which can realize the voice communication, command communication, ranging and direction finding functions of underwater frogmen through reasonable division of working frequency bands and special design of signal frame structure.

[0004] The technical solution of the present invention is to provide an integrated control method for underwater frogman formation communication and positioning.

[0005] The communication system adopted in the method has a transmission signal frame structure consisting of a communication signal + gap + direction-finding signal or a direction-finding signal + gap + communication signal, wherein the communication signal is at least one of a voice communication signal, an instruction or a ranging communication signal, and the communication system divides the working frequency band into a communication signal working frequency band and a direction-finding signal working frequency band.

[0006] Preferably, the direction finding signal is a pseudo-random coded signal, and different device numbers are assigned different pseudo-random sequences.

[0007] Preferably, the transmission of the direction finding signal is configured to be controllable to be turned on or off.

[0008] As a preferred embodiment, it is assumed that the working frequency of the communication system is divided into three frequency bands B0, B1, and B2, wherein the B0 frequency band is used as the working frequency band of the direction finding signal, and the B1 frequency band and the B2 frequency band are used as the communication working frequency band. At the same time, the communication system is equipped with a surface command center communication device and four underwater frogman communication devices W1 to W4, and each of them is assigned a pseudo-random sequence m0 to m4 of length 511 for coding and modulation of the direction finding signal;

[0009] During operation, the underwater frogman communication devices W1 and W2 form a pair, with the configured communication working frequency band being B1. W1 and W2 achieve voice conversations through the voice communication signals in the B1 frequency band, achieve mutual command transmission through the command communication signals in the B1 frequency band, achieve mutual ranging through the ranging communication signals in the B1 frequency band, and achieve mutual direction finding by modulating the direction finding signals with m1 and m2 encoded in the B0 frequency band following the communication signals.

[0010] Preferably, the underwater frogman communication devices W3 and W4 form a pair, with the configured communication working frequency band being B2. W3 and W4 achieve voice conversations through the voice communication signals in the B2 frequency band, achieve mutual command transmission through the command communication signals in the B2 frequency band, achieve mutual ranging through the ranging communication signals in the B2 frequency band, and achieve mutual direction finding by modulating the direction finding signals with m3 and m4 encoded in the B0 frequency band following the communication signals.

[0011] Furthermore, the surface command center communication device achieves two-way voice communication, command communication, ranging, and direction finding with W1 - W4 by configuring the communication working frequency band as B1 or B2 and modulating the direction finding signals with m0 encoded in the B0 frequency band following it. To achieve timely update of the surface - to - underwater situation, meanwhile, the surface command center communication device continuously detects the direction finding signals modulated with m1 - m4 encoded in the B0 frequency band and calculates and outputs the direction finding results.

[0012] After adopting the above - mentioned scheme, compared with the prior art, the present invention has the following advantages:

[0013] This method can meet the compatible requirements of multi - group underwater frogman voice communication and positioning. Through reasonable division of the working frequency band and special design of the signal frame structure, it can achieve the functions of voice communication, command communication, ranging, and direction finding for underwater frogmen. Description of the Drawings:

[0014] Figure 1 It is a schematic diagram of the transmitted signal frame structure of an embodiment of the present invention;

[0015] Figure 2 It is a schematic diagram of the integrated working process of underwater frogman formation communication and positioning of an embodiment of the present invention. Detailed Embodiment:

[0016] The following further describes the present invention in detail in conjunction with the drawings:

[0017] As shown in Figure 1 and 2As shown in the figure, an integrated control method for underwater frogman formation communication and positioning in this embodiment assumes that the system operating frequency range is 18 kHz to 28 kHz, which is divided into three frequency bands B0, B1, and B2. Among them, the B0 frequency band of 18k - 20kHz is used for the working frequency band of the direction-finding signal, and the B1 frequency band of 21k - 24kHz and the B2 frequency band of 25k - 28kHz are used for the communication working frequency band. The system is configured with a surface command center communication device and four underwater frogman communication devices (W1 - W4), and a pseudo-random sequence m0 - m4 with a length of 511 is assigned to each of them for the encoding and modulation of the direction-finding signal.

[0018] During operation, the underwater frogman communication devices W1 and W2 form a pair, and the configured communication working frequency band is B1. W1 and W2 achieve voice conversations through the voice communication signal in the B1 frequency band, achieve mutual command transmission through the command communication signal in the B1 frequency band, achieve mutual ranging through the ranging communication signal in the B1 frequency band, and achieve mutual direction-finding by modulating the direction-finding signal with m1 and m2 in the B0 frequency band following the communication signal. The processing flow is shown in Figure 2 .

[0019] The underwater frogman communication devices W3 and W4 form a pair, and the configured communication working frequency band is B2. W3 and W4 achieve voice conversations through the voice communication signal in the B2 frequency band, achieve mutual command transmission through the command communication signal in the B2 frequency band, achieve mutual ranging through the ranging communication signal in the B2 frequency band, and achieve mutual direction-finding by modulating the direction-finding signal with m3 and m4 in the B0 frequency band following the communication signal.

[0020] The surface command center communication device realizes two-way voice communication, command communication, ranging, and direction-finding with W1 - W4 by configuring the communication working frequency band as B1 or B2 and modulating the direction-finding signal with m0 in the B0 frequency band following it. To achieve timely update of the surface-to-underwater situation, at the same time, the surface command center communication device continuously detects the direction-finding signals modulated by m1 - m4 in the B0 frequency band and calculates and outputs the direction-finding results.

[0021] The above is only an illustration of the preferred embodiments of the present invention, but it should not be construed as a limitation of the claims. Any equivalent structure or equivalent process transformation made using the description of the present invention is included within the scope of the patent protection of the present invention.

Claims

1. An integrated control method for underwater frogman formation communication and positioning, characterized in that: The communication system adopted by this method has a transmitted signal frame structure composed of communication signal + gap + direction-finding signal or direction-finding signal + gap + communication signal. The communication signal is at least one of voice communication signal, command, or ranging communication signal. And the communication system divides the working frequency band into a communication signal working frequency band and a direction-finding signal working frequency band; Suppose the working frequency of the adopted communication system is divided into three frequency bands B0, B1, and B2. Among them, the B0 frequency band is used for the working frequency band of the direction-finding signal, and the B1 and B2 frequency bands are used for the communication working frequency band. At the same time, the communication system configures a surface command center communication device and four underwater frogman communication devices W1 to W4, and assigns a pseudo-random sequence m0 to m4 to each of them for the coding and modulation of the direction-finding signal; During operation, underwater frogman communication devices W1 and W2 form a pair, with the configured communication working frequency band being B1. W1 and W2 achieve voice conversations through the voice communication signal in the B1 frequency band, achieve mutual command transmission through the command communication signal in the B1 frequency band, achieve mutual ranging through the ranging communication signal in the B1 frequency band, and modulate the direction-finding signal through the m1 and m2 coding in the B0 frequency band following the communication signal to achieve mutual direction-finding.

2. The integrated control method for underwater frogman formation communication and positioning according to claim 1, characterized in that: The direction-finding signal is a pseudo-random coded signal, and different device numbers are assigned different pseudo-random sequences.

3. The integrated control method for underwater frogman formation communication and positioning according to claim 1, characterized in that: The transmission of the direction-finding signal is set to be controllable to be turned on or off.

4. The integrated control method for underwater frogman formation communication and positioning according to claim 1, characterized in that: Underwater frogman communication devices W3 and W4 form a pair, with the configured communication working frequency band being B2. W3 and W4 achieve voice conversations through the voice communication signal in the B2 frequency band, achieve mutual command transmission through the command communication signal in the B2 frequency band, achieve mutual ranging through the ranging communication signal in the B2 frequency band, and modulate the direction-finding signal through the m3 and m4 coding in the B0 frequency band following the communication signal to achieve mutual direction-finding.

5. The integrated control method for underwater frogman formation communication and positioning according to claim 1, characterized in that: The surface command center communication device realizes two-way voice communication, command communication, ranging, and direction-finding with W1 to W4 by configuring the communication working frequency band as B1 or B2 and modulating the direction-finding signal with the m0 coding in the B0 frequency band following it. To achieve timely update of the surface-to-underwater situation, at the same time, the surface command center communication device continuously detects the m1 to m4 coding modulated direction-finding signals in the B0 frequency band and calculates and outputs the direction-finding results.

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