CN110658566A

CN110658566A - Seabed geomagnetism daily variation observation device

Info

Publication number: CN110658566A
Application number: CN201911086715.2A
Authority: CN
Inventors: 刘晨光; 刘保华; 裴彦良; 华清峰; 孙蕾
Original assignee: First Institute of Oceanography MNR
Current assignee: First Institute of Oceanography MNR
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-01-07

Abstract

The invention belongs to the field of ocean detection, and discloses a seabed geomagnetic daily variation observation device for solving the problem that an ocean geomagnetic field is difficult to observe in the prior art. The invention can improve the precision of ocean geomagnetic detection, and has simple structure and convenient operation.

Description

Seabed geomagnetism daily variation observation device

Technical Field

The invention belongs to the field of ocean exploration, and particularly relates to a submarine geomagnetic daily variation observation device.

Background

The magnetic field change measured in the geomagnetic measurement is related to the magnetic field caused by the change of the sun still day (short for the change of day) in addition to the geological structure and the rock magnetism. Therefore, in terrestrial and offshore geomagnetic survey, a terrestrial daily variation observation station is generally set up within a certain range (usually less than <500km) of a survey area to perform fixed-point time-series observation on the magnetic field variation caused by the daily variation, and perform daily variation correction on geomagnetic measurement data, thereby eliminating the influence of the daily variation. In the open sea and ocean surveys, a geomagnetic daily variation station cannot be set up on nearby land, and the precision of the geomagnetic survey is greatly reduced.

Disclosure of Invention

In order to adapt to the actual requirements in the field of ocean geomagnetic observation, the invention overcomes the defects in the prior art and solves the technical problems that: the submarine geomagnetic daily variation observation device is simple in structure and convenient to install.

In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a seabed earth magnetism daily change observation device, includes buoyancy ball, sensor cabin, electron cabin and release recovery unit, be provided with magnetic sensor in the sensor cabin, be provided with power module, data acquisition control module, storage module and wireless transmission module in the electron cabin, power module is used for supplying power for electron cabin and sensor cabin, data acquisition control module with storage module and wireless transmission module connect, magnetic sensor in the sensor cabin pass through the watertight cable with the data acquisition control module electricity in the electron cabin is connected, loop through the hawser between buoyancy ball, sensor cabin, electron cabin and the release recovery unit and connect.

The buoyancy ball, the sensor cabin and the electronic cabin are all sealed pressure-resistant glass floating balls.

The releasing and recovering unit comprises a releaser and a weight, one end of the releaser is connected with the electronic cabin, the sensor cabin and the floating ball through cables, and the other end of the releaser is connected with the weight.

The releaser is an acoustic releaser.

The cable is a high-strength cable.

Compared with the prior art, the invention has the following beneficial effects: the invention provides a submarine geomagnetic daily variation observation device, which can acquire data through a geomagnetic sensor and realize acquisition, storage and transmission of geomagnetic data through a data acquisition control unit, a storage unit and a wireless communication unit, and can ensure that a certain distance is kept between a magnetic sensor and circuit elements in an electronic cabin by arranging the geomagnetic sensor and related circuits in different sealed cabin bodies so as to avoid the influence of the own magnetic field of electronic equipment in the electronic cabin, so that the geomagnetic daily variation observation device can perform geomagnetic daily variation observation in a sea area and acquire geomagnetic daily variation observation data, thereby improving the precision of ocean and ocean geomagnetic measurement; in addition, the observation device comprises a release and recovery unit, and the releaser can release a heavy object to float the observation device, so that the observation device is recycled.

Drawings

Fig. 1 is a schematic structural diagram of an observation apparatus for observing geomagnetic diurnal variation in the sea bottom according to an embodiment of the present invention;

fig. 2 is a schematic circuit structure diagram of an observation apparatus for observing geomagnetic diurnal variation in the seafloor provided in an embodiment of the present invention;

fig. 3 is a schematic structural view of an acoustic releaser in the embodiment of the present invention.

Detailed Description

In order to make the technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments and accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a device for observing daily variation of geomagnetism in a sea floor, including a buoyancy ball 1, a sensor cabin 2, an electronic cabin 3, and a release recovery unit 4, where the buoyancy ball 1, the sensor cabin 2, the electronic cabin 3, and the release recovery unit 4 are connected in sequence through a cable 11.

Further, as shown in fig. 2, a magnetic sensor 5 is arranged in the sensor cabin 2, a power supply module 6, a data acquisition control module 7, a storage module 8 and a wireless transmission module 9 are arranged in the electronic cabin 3, the power supply module 6 is used for supplying power to the electronic cabin 3 and the sensor cabin 2, the data acquisition control module 7 is connected with the storage module 8 and the wireless transmission module 9, and the magnetic sensor 5 in the sensor cabin 8 is electrically connected with the data acquisition control module 7 in the electronic cabin 3 through a watertight cable 10.

Specifically, in this embodiment, the buoyancy ball 1, the sensor chamber 2, and the electronic chamber 3 are all sealed pressure-resistant glass floating balls. The sensor cabin and the electronic cabin made of the glass floating ball can enable the sensor cabin and the electronic cabin to have certain buoyancy, and in addition, the buoyancy ball 1 made of the glass floating ball can further provide buoyancy for the whole system.

In this embodiment, the magnetic sensor 5 is located inside a sealed pressure-resistant glass floating ball, which is a container for containing the magnetic sensor and provides a certain buoyancy for the whole device. The power supply module 6, the data acquisition control module 7, the storage module 8 and the wireless transmission module 9 are arranged inside the other sealed pressure-resistant glass floating ball, and certain buoyancy is provided for the whole electronic cabin. The magnetic sensor 5 is an element for measuring the intensity of the geomagnetic field, is sealed in the sensor cabin 2, is connected with the acquisition control unit positioned in the electronic cabin 3 through a watertight cable, and is used for measuring the intensity of the geomagnetic field according to the command of the data acquisition control unit. Through the arrangement of the sensor cabin and the electronic cabin, the magnetic sensor can keep a certain distance from circuit elements in the electronic cabin so as to avoid the influence of the magnetic field of the electronic equipment in the electronic cabin.

Specifically, in this embodiment, the data acquisition control module adopts a high-performance embedded ARM as a main controller and a data processor, and is configured to set commands such as start of acquisition, end of acquisition, and sampling frequency of the magnetic sensor, and acquire data of the magnetic sensor. The wireless transmission module is used for performing man-machine interaction through WIFI or other wireless networks, setting acquisition parameters and downloading acquired geomagnetic field intensity data; the storage module adopts a double SD card mode to independently store 2 data files.

Specifically, in this embodiment, the power supply module is integrated in the electronic cabin, and includes storage battery and low-voltage power supply module, provides the electric energy for whole seabed geomagnetic daily variation observation device.

In addition, the release recovery unit is used to secure the entire device to the sea floor during the survey and to disengage the weights during recovery of the device, returning the entire device to the surface for recovery.

Specifically, in the present embodiment, the releasing and recovering unit 4 includes a releaser 12 and a weight 13, and one end of the releaser 12 is connected to the electronic compartment 3 through a cable 11, and the other end is connected to the weight 13. The releaser is used for connecting the heavy object and the geomagnetic daily variation observation system and separating the heavy object during recovery. The weight is used for fixing the whole ocean geomagnetic daily variation observation device on the seabed.

Further, the releaser 12 is an acoustic releaser. As shown in fig. 3, the acoustic releaser comprises an acoustic transducer 14, a unhooking mechanism 15 and an attached electronic and mechanical device, and the releaser can be disengaged from the heavy object after the acoustic transducer receives an acoustic command and the action of the unhooking mechanism is controlled by the electronic and mechanical device.

Specifically, in the present embodiment, the cable 11 connecting the float, the sensor compartment, the electronic compartment, the release and the weight is a high-strength cable.

The observation method of the geomagnetic daily variation observation device comprises the following steps: when marine geomagnetic detection is carried out, the floating ball is firstly put into water, then the sensor cabin, the electronic cabin, the cable and the releaser are sequentially put into the floating ball, and finally the heavy block is put into the floating ball. It should be noted that the length of the cable needs to be preset according to the water depth and other conditions to ensure that the sensor cabin is just located within the set depth range after the weight reaches the seabed. After all the equipment is immersed in water and fixed in position, the survey ship enters a working state, and geomagnetic detection operation is carried out according to a set measuring line; the geomagnetic sensor observes the daily variation of the geomagnetic field according to a preset sampling frequency, and the data acquisition control module acquires and records data of the geomagnetic sensor and sends the data to the data storage module for storage. When the ocean geomagnetic measurement finishes, send the acoustics order, the releaser breaks away from with the pouring weight, and whole earth magnetism daily change observation device floats out of the water under the effect of floater buoyancy, and available instrument is retrieved to the ship. And the professional communicates with the wireless transmission module through the WIFI to download geomagnetic daily change observation data, and the operation is finished.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. The submarine geomagnetic daily variation observation device is characterized by comprising a buoyancy ball (1), a sensor cabin (2), an electronic cabin (3) and a release recovery unit (4), wherein a magnetic sensor (5) is arranged in the sensor cabin (2), a power supply module (6), a data acquisition control module (7), a storage module (8) and a wireless transmission module (9) are arranged in the electronic cabin (3), the power supply module (6) is used for supplying power to the electronic cabin (3) and the sensor cabin (2), the data acquisition control module (7) is connected with the storage module (8) and the wireless transmission module (9), the magnetic sensor (5) in the sensor cabin (8) is electrically connected with the data acquisition control module (7) in the electronic cabin (3) through a watertight cable (10), and the buoyancy ball (1), the sensor cabin (2) and the release recovery unit (4), The electronic cabin (3) and the releasing and recovering unit (4) are connected through a cable (11) in sequence.

2. The device for observing the daily variation of the ocean floor geomagnetism according to claim 1, wherein the buoyancy ball (1) and the bodies of the sensor chamber (2) and the electronic chamber (3) are sealed pressure-resistant glass floating balls.

3. The device for observing the daily variation of the geomagnetism on the sea bottom according to claim 1, wherein the releasing and recovering unit (4) comprises a releaser (12) and a weight (13), one end of the releaser (12) is connected with the sensor cabin (2), the electronic cabin (3) and the buoyancy ball (1) through a cable (11), and the other end is connected with the weight (13).

4. A submarine geomagnetic daily variation observation apparatus according to claim 3, wherein the releaser (12) is an acoustic releaser.

5. The device for observing geomagnetic diurnal variations in the sea bottom according to any one of claims 1 to 4, wherein the cable (11) is a high-strength cable.