CN203965634U

CN203965634U - A kind of ocean controllable source electromagnetic surveying transmitter underwater units

Info

Publication number: CN203965634U
Application number: CN201420275629.2U
Authority: CN
Inventors: 张一鸣; 史志富; 陶海军; 任喜国; 曾志辉; 朱学政; 王旭红
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2014-05-27
Filing date: 2014-05-27
Publication date: 2014-11-26
Anticipated expiration: 2024-05-27

Abstract

The utility model relates to a kind of ocean controllable source electromagnetic surveying transmitter underwater units, belongs to marine electromagnetic Detection Techniques field.Described device comprises full-bridge DC/DC transducer, transmitting bridge, electrode, controller and carrier modulator.Device described in the utility model adopts DC power supply, has volume little, dependable performance, and the feature that efficiency and automaticity are high, meets installation dimension and the heat radiation requirement of underwater towed-body.

Description

A kind of ocean controllable source electromagnetic surveying transmitter underwater units

Technical field

The utility model relates to a kind of ocean controllable source electromagnetic surveying transmitter underwater units, belongs to marine electromagnetic Detection Techniques field.

Background technology

In exploration of ocean resources performance history, because drilling cost is high, investment risk is large, each major oil companies, before carrying out offshore drilling, all will carry out the integrated exploration work of the multiple marine geophysics methods such as earthquake, gravity, magnetic force, to improve drilling well success ratio in the world.Ocean controllable source electromagnetic surveying has the advantages that can distinguish profit character in trap, disclose " high resistance body " under volcanics covering, has become one of most important means that reduce deep water hydrocarbon resource probing risk.Controllable source ocean EM exploration system excites to seabed power supply by the transmitter being pulled by towboat, and many components electromagnetism receiver is laid in to subsea survey electromagnetic field value.By calculating apparent resistivity and phase place, or the Electric and magnetic fields that directly utilization is observed reaches the object of Underground Electrical distribution feature, the regularity of distribution of the mineral resources such as announcement fabric and oil gas.

Start ocean EM exploration technology and instrument development exploitation the seventies in last century, mainly contain U.S. Scripps institute of oceanography (SIO), German Leibniz Institute of Marine Science (IFM-GEOMAR), Britain undersea device association (OCIB), Japanese TIERRA company etc.Meanwhile, the world a few Large Marine Ecosystem electromagnetic surveying service company (as Norway EMGS company, Britain OHM company, the AGO of the U.S., the MTEM of Britain etc.) sets up in succession, and has carried out multinomial ocean EM exploration project.At present transmitter exists that volume and weight is large, heating is serious, is not suitable for sealing under water, exports in addition electromagnetic instantaneity bad, can not meet the actual exploration demand of petroleum industry.

Utility model content

The problem of the purpose of this utility model with regard to being to exist for ocean controllable source electromagnetic surveying transmitter, a kind of ocean controllable source electromagnetic surveying transmitter underwater units is provided, described device volume is little, lightweight, device loss is little, the features such as instantaneity is good, and thermal value is little, meet exploration of ocean resources demand.

The purpose of this utility model is achieved through the following technical solutions:

An ocean controllable source electromagnetic surveying transmitter underwater units, comprising: full-bridge DC/DC transducer, transmitting bridge, emitting electrode and controller;

Described full-bridge DC/DC transducer comprises inverter bridge, high-frequency transformer, filtering high-frequency rectifier, voltage detection module and current detection module;

Described inverter bridge comprises four IGBT modules;

Described transmitting bridge comprises four IGBT modules and current detection module;

Described emitting electrode comprises firing cable, emitting electrode A and emitting electrode B;

Direct supply on ship is connected with described full-bridge DC/DC transducer by line of electric force, and described full-bridge DC/DC transducer connects described transmitting bridge, and described transmitting bridging connects described emitting electrode.

Described controller comprises dsp chip, fpga chip, voltage modulate circuit, current regulating circuit, current over-zero testing circuit, driving circuit and SCI communication port;

The dsp chip of described controller and fpga chip connect by described driving circuit and described full-bridge DC/DC transducer and described transmitting bridging respectively;

Described device also comprises carrier modulator;

Described carrier modulator comprises isolation/amplification module, carrier modulation/demodulation module and SCI communication port;

Described carrier modulator connects described controller by described SCI communication port, by isolation/amplification module, is connected on the direct supply and the line of electric force between described full-bridge DC/DC transducer on described ship.

The beneficial effects of the utility model are:

The utility model adopts DC power supply, and described device volume is little, lightweight, and device loss is little, and instantaneity is good, and thermal value is little, meets exploration of ocean resources demand.

Controller described in the utility model, controls full-bridge DC/DC transducer and transmitting bridge, simultaneously with host computer carrier communication, and collaborative each several part work.

Accompanying drawing explanation

Fig. 1 ocean controllable source electromagnetic surveying transmitter underwater units structural drawing;

Fig. 2 full-bridge DC/DC transducer cut-away view;

Fig. 3 launches bridge cut-away view;

Fig. 4 emitting electrode structural drawing;

Fig. 5 controller cut-away view;

Fig. 6 carrier modulator johning knot composition.

Embodiment

Narrate with reference to the accompanying drawings the embodiment of utility model.

According to a kind of ocean controllable source electromagnetic surveying transmitter underwater units described in the utility model and control method thereof, utilize towing cable to drag towed body and move emitting electromagnetic wave, excite the detected target body in seabed, receiver measures its electromagnetic induction signal, thereby obtain the electrical structure information of the following deep layer medium in seabed, disclose the regularity of distribution of the mineral resources such as seabed fabric and oil gas.

An ocean controllable source electromagnetic surveying transmitter underwater units, comprising: full-bridge DC/DC transducer, transmitting bridge, electrode, controller and carrier controller, as shown in Figure 1.

Described inverter bridge comprises four IGBT modules, as shown in Figure 2.

Described transmitting bridge comprises four IGBT modules and current detection module, as shown in Figure 3.

Described emitting electrode comprises firing cable, emitting electrode A and emitting electrode B, and both,, at a distance of 100～300 meters, as shown in Figure 4, launch for transmitting the large power, electrically magnetic wave that bridge produces afterwards.

Described controller comprises dsp chip, fpga chip, voltage modulate circuit, current regulating circuit, current over-zero testing circuit, driving circuit and SCI communication port.

Between DSP and FPGA, adopt SPI communication, between controller and host computer, adopt SCI to communicate by letter, as shown in Figure 5.

Controller is used for controlling full-bridge DC/DC transducer, transmitting bridge and communicates by letter with host computer.

Described carrier modulator comprises isolation/amplification module, carrier modulation/demodulation module and SCI communication port, as shown in Figure 6.

Direct supply on ship is connected with described full-bridge DC/DC transducer by line of electric force, and described full-bridge DC/DC transducer connects described transmitting bridge, and described transmitting bridging connects described emitting electrode;

Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the utility model.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims

1. an ocean controllable source electromagnetic surveying transmitter underwater units, is characterized in that, comprising: full-bridge DC/DC transducer, transmitting bridge, emitting electrode and controller;

Described inverter bridge comprises four IGBT modules;

The dsp chip of described controller and fpga chip connect by described driving circuit and described full-bridge DC/DC transducer and described transmitting bridging respectively.

2. a kind of ocean controllable source electromagnetic surveying transmitter underwater units according to claim 1, is characterized in that, described device also comprises carrier modulator;