CN-122001492-A - Anti-interference system and method for wireless communication of submarine nodes

CN122001492ACN 122001492 ACN122001492 ACN 122001492ACN-122001492-A

Abstract

The invention relates to the technical field of wireless communication, and provides a submarine node wireless communication anti-interference system which comprises a high-transmission-rate signal module and a low-transmission-rate signal module based on a millimeter wave frequency band, wherein the high-transmission-rate signal module is configured to transmit and receive network data streams and is used for seismic data transmission, the serial port signal module is configured to transmit time service signals, the second pulse signal module is configured to calibrate clocks, and an antenna emission plane of the high-transmission-rate signal module is intersected with an antenna emission plane of the low-transmission-rate signal module, and the intersection angle is larger than half of the sum of half power wave beam widths of antennas. The wireless communication module placement distance can be reduced to a greater extent in narrow working scenes such as submarine nodes, so that the space requirement can be well adapted, signal interference can be effectively eliminated, and high-speed seismic data, low-speed control and time service signal stable transmission can be ensured. The method provided by the invention has corresponding advantages.

Inventors

YUAN CHEN
CHEN HAOLIN
LU TAO
LIU SEN
FAN JU
FU MINGHUI

Assignees

中国石油集团东方地球物理勘探有限责任公司
中国石油天然气集团有限公司

Dates

Publication Date: 20260508
Application Date: 20251226

Claims (14)

1. The submarine node wireless communication anti-interference system is characterized by comprising a high transmission rate signal module and a low transmission rate signal module based on a millimeter wave frequency band; the low transmission rate signal module comprises a serial port signal module and a second pulse signal module; The high transmission rate signal module is configured to transmit and receive network data streams for seismic data transmission; The serial port signal module is configured for time service signal transmission; The pulse-per-second signal module is configured for clock calibration; The antenna emission plane of the high transmission rate signal module is intersected with the antenna emission plane of the low transmission rate signal module, and the intersection angle is larger than half of the sum of half power beam widths of the two groups of antennas.
2. The system of claim 1, wherein the antenna emission plane of the high transmission rate signal module is perpendicular to the antenna emission plane of the low transmission rate signal module.
3. The anti-interference system for wireless communication of a subsea node according to claim 1, wherein the serial port signal module and the pulse per second signal module are respectively disposed on two sides of the high transmission rate signal module.
4. The anti-interference system for wireless communication of a subsea node according to claim 1, wherein the receiving end and the transmitting end of the serial port signal module are in unidirectional communication and are disposed in different planes separated by a preset distance.
5. The anti-interference system for wireless communication of a subsea node according to claim 1, wherein the receiving end and the transmitting end of the pulse-per-second signal module are in unidirectional communication and are disposed in different planes separated by a predetermined distance.
6. The subsea node wireless communication anti-interference system according to any of claims 1-5, characterized in that the high transmission rate signal module comprises a first network signal module and a second network signal module arranged in a cross-pairing; the first network signal module is in bidirectional communication with the second network signal module; the transmitting end of the first network signal module and the receiving end of the second network signal module are arranged in a first plane, and the receiving end of the first network signal module and the transmitting end of the second network signal module are arranged in a second plane; the paired transmitting end and receiving end are in line-of-sight wireless communication connection, and shielding is avoided.
7. The system of claim 6, wherein the distance between the first plane and the second plane is set based on the electric field coupling strength of the signal, and the distance between the transmitting end and the receiving end in the same plane is set based on the half power beam width of the antenna.
8. The anti-interference system for wireless communication of a submarine node according to claim 6, wherein the millimeter wave frequency band is 60GHz, and the distance between a transmitting end and a receiving end in the same plane is 3 cm to 6 cm.
9. The wireless communication anti-jamming system of a subsea node according to claim 6, further comprising a first housing and a second housing; The first shell is concave, and the second shell is several-shaped; The transmitting end of the first network signal module and the receiving end of the second network signal module are fixedly arranged on the surface of the first shell, which is away from the second shell; The receiving end of the first network signal module and the transmitting end of the second network signal module are fixedly arranged on the surface, deviating from the first shell, of the second shell.
10. The wireless communication anti-interference system of the submarine node according to claim 9, wherein the horizontal section of the concave bottom is in the first plane, the horizontal section of the Chinese character 'ji' shape is in the second plane, the receiving end of the serial port signal module and the receiving end of the second pulse signal module are respectively and fixedly arranged on the outer surfaces of two opposite sides of the concave vertical section of the first shell, and the transmitting end of the serial port signal module and the transmitting end of the second pulse signal module are respectively and fixedly arranged on the inner surfaces of two opposite sides of the Chinese character 'ji' shape vertical section of the second shell.
11. The wireless communication anti-interference system of the submarine node according to claim 9, further comprising a signal shielding flap; The signal shielding baffle plate is in a T shape, the horizontal section of the T shape is parallel to the horizontal section of the Chinese character 'ji', and the vertical section of the T shape is parallel to the vertical section of the Chinese character 'ji'; The signal shielding baffle plate divides the inner space into three mutually isolated spaces; The signal shielding baffle is made of a high-permeability soft magnetic material, and the high-permeability soft magnetic material comprises permalloy.
12. A method for anti-interference of wireless communication of a submarine node, which is implemented by the anti-interference system of wireless communication of a submarine node according to any one of claims 1 to 11, comprising: The method comprises the steps of respectively configuring a plurality of wireless communication modules into a high transmission rate signal module and a low transmission rate signal module, and disposing the high transmission rate signal module and the low transmission rate signal module in different planes; Determining a near-field range and half-power beam width of an antenna based on the millimeter wave frequency band, and calculating to obtain an electric field coupling strength threshold based on a preset anti-interference threshold; determining a range of spacing of the wireless communication modules in the same plane based on the near field range, the electric field coupling strength threshold, and a half-power beam width of the antenna; Calculating the intersection angles of different planes of the high transmission rate signal module and the low transmission rate signal module based on the half-power beam width of the antenna; a fixed position of the wireless communication module is determined based on the range of distances and the intersection angle.
13. The method of claim 12, wherein the method of configuring the high transmission rate signal module includes cross pairing two wireless communication modules for transmitting hundred megalevel network signals to form redundancy and/or parallel transmission channels; The method for configuring the low transmission rate signal module comprises the steps of configuring a plurality of wireless communication modules for transmitting serial signals and a plurality of wireless communication modules for transmitting second pulse signals.
14. The method for resisting interference in wireless communication of a submarine node according to claim 12 or 13, further comprising configuring a working base for fixing the plurality of wireless communication modules according to the interval range and the intersecting angle of the plane, wherein the working base comprises a first housing in a concave shape and a second housing in a several shape, and the second housing is configured with a T-shaped signal shielding baffle inside the several shapes.

Description

Anti-interference system and method for wireless communication of submarine nodes Technical Field The invention belongs to the technical field of wireless communication, and particularly relates to an anti-interference system and method for wireless communication of a submarine node in marine seismic exploration. Background In the field of marine oil and gas exploration, an OBN (Ocean Bottom Node, a submarine node) is a multicomponent seismograph which is positioned on the seabed and can independently acquire and record seismic signals. The method has the characteristics of wide azimuth, high coverage, high construction efficiency, multi-component recording, strong feasibility of complex terrain and the like, and is a mainstream method for current marine seismic acquisition. The OBN submarine node is required to be charged, time-service and clock calibration on the ship, is set to be placed under water after collection for long-time data collection, and is used for downloading data on the ship after recovery. Conventionally, wired communication is used, and waterproof sockets are installed on nodes, so that pins of the waterproof sockets are corroded and poorly contacted or water leakage exists when the waterproof sockets are used for a long time. The short-distance wireless communication technology gradually replaces contact type connection of the waterproof socket, so that the tightness is greatly improved, and the problems of poor contact and the like after socket contact pin corrosion are avoided. The point-to-point ultra-short distance millimeter wave wireless transmission module is selected to realize wireless communication, and high-speed data transmission can be met. The current marine seismic exploration field, the ultra-short distance wireless communication technology, which is a key support for marine oil and gas exploration, is characterized in that the existing wireless scheme also faces pain points such as co-frequency band module interference, limited narrow space layout, difficult control of high-frequency signal attenuation and the like, and the industry is developing towards multi-technology cooperation, anti-interference capability reinforcement and equipment miniaturization adaptation OBN scene. In marine seismic exploration, a plurality of groups of channels are deployed in the wireless OBN node based on millimeter wave wireless links, wherein a high-speed interface channel is responsible for large data volume transmission, and a low-speed interface channel is used for synchronizing system time service and clocks, so that the requirement of multi-service parallel communication is met. The high-speed signal adopts a differential interface and has strong anti-interference capability, the low-speed signal is single-ended CMOS, and the anti-interference capability is relatively weak, but the low-delay advantage is realized. Due to the limitation of the prior art, the main problem is faced that the dense deployment of multiple modules in a narrow space of an OBN device is easy to cause co-channel interference, and the traditional shielding scheme is difficult to balance the volume and the efficiency. It is known that there is a need to develop an anti-interference system and method for wireless communication of a submarine node, so as to realize anti-interference of ultra-short distance wireless communication of multiple groups of wireless communication modules in the same space, and effectively solve the problem of mutual interference when multiple groups of wireless communication modules simultaneously deploy high-speed signals and low-speed signals in a narrow space, thereby promoting deep application of the wireless communication technology. Disclosure of Invention In order to solve all or part of the problems in the prior art, the invention provides an anti-interference system for wireless communication of a submarine node, which is matched with the specific requirements of co-channel interference and millimeter wave signal transmission of a plurality of groups of wireless communication modules in a narrow space of an OBN device, and realizes stable and reliable communication of a plurality of types of signals under ultra-short distance. The invention further provides an anti-interference method for wireless communication of the submarine node. An aspect of the present invention provides an anti-interference system for wireless communication of a subsea node, including: The system comprises a millimeter wave frequency band-based high-transmission rate signal module and a low-transmission rate signal module, wherein the low-transmission rate signal module comprises a serial port signal module and a second pulse signal module, the high-transmission rate signal module is configured to transmit and receive network data streams and is used for seismic data transmission, the serial port signal module is configured to transmit time service signals, the second pulse signal module is configured