Submarine hydrate three-dimensional distribution detection device

Abstract

The utility model discloses a seabed hydrate three-dimensional distribution detection device, which comprises a module part and a measurement unit part, and is characterized in that the module part comprises a capacitance sensor, a signal conditioning circuit, an A / D converter, a D / A converter, a single chip microcomputer, a power amplifier, a wire connection module and an upper computer; the dielectric constant measuring unit part comprises a measuring unit A, a measuring unit B, a measuring unit C and a measuring unit D. According to the submarine hydrate three-dimensional distribution detection device, the measurement device is placed in submarine sediments, and then three-dimensional space distribution of submarine hydrates is detected.

Description

Technical Field

[0001] The utility model relates to the technical field of seabed in-situ natural gas hydrate measurement, in particular to a three-dimensional distribution detection device for seabed hydrate. Background Art

[0002] Natural Gas Hydrate, also known as combustible ice, is an ice-like crystalline substance formed by methane and other small molecular natural gases and water under specific low temperature and high pressure conditions. Natural gas hydrates are mainly distributed in deep-sea sediments or permafrost on land. The methane content accounts for 80% to 99.9%, and the pollution caused by combustion is much smaller than that of coal and oil. In addition, the reserves are abundant. The global reserves are enough for human use for 1,000 years. Therefore, it is regarded by various countries as an alternative energy source for oil and natural gas in the future. In my country, the investigation and research of natural gas hydrates has achieved certain results, and commercial exploitation is expected to be realized in the future.

[0003] As one of the characteristic parameters of materials, dielectric constant can well reflect the performance of materials. With the development of hydrate exploration technology and the continuous deepening of research on the characteristics of hydrate sediments, dielectric constant has become an important parameter in the study of hydrate characteristics. At present, the commonly used dielectric constant measurement methods include resonant cavity method, free space method, transmission line method and capacitance method. Compared with other measurement methods, the capacitance method has the advantages of low cost, fast response speed, convenient operation, and can be used for the measurement of various media. It is currently widely used.

[0004] The formation and decomposition process of seabed hydrates is uneven, and detecting the three-dimensional spatial distribution of hydrates has always been a technical problem that needs to be solved. Utility Model Content

[0005] The utility model aims to put the measuring device into the seabed sediment and then detect the three-dimensional spatial distribution of the seabed hydrate.

[0006] To achieve the above-mentioned purpose, the utility model provides a three-dimensional distribution detection device for seabed hydrates, including a module part and a measuring unit part. The module part includes a capacitive sensor, a signal conditioning circuit, an A / D converter, a D / A converter, a single-chip microcomputer, a power amplifier, a wire connection module and a host computer, and the dielectric constant measurement unit part includes a measurement unit A, a measurement unit B, a measurement unit C and a measurement unit D.

[0007] Preferably, the capacitive sensor includes a parallel plate capacitive sensor and a flat plate capacitive sensor, and the capacitive sensor is mounted on an insulating and corrosion-resistant dielectric substrate.

[0008] Preferably, each of the measuring units consists of two pairs of capacitors.

[0009] Preferably, the capacitive sensor is placed in the sediment hydrate, and the excitation signal generated by the single chip microcomputer is loaded on the excitation electrode after passing through the D / A converter and the power amplifier.

[0010] Preferably, the wire connection module selects the measurement unit by controlling the on and off of a multi-way switch.

[0011] Preferably, the capacitance signal in the capacitance sensor is converted into a voltage signal by the signal conditioning circuit, and the voltage signal is converted into a digital signal by the A / D converter.

[0012] Preferably, the single chip microcomputer communicates with the host computer via USB.

[0013] Preferably, the measuring device is placed in the seabed sediment, and the measuring device consists of four measuring units, wherein the measuring unit A and the measuring unit C are exposed above the water surface and arranged in the bottom seawater, and the measuring unit B and the measuring unit D are inserted into the seabed sediment, and then the three-dimensional spatial distribution of the seabed hydrate is detected.

[0014] Therefore, the utility model adopts a three-dimensional distribution detection device of seabed hydrate of the above structure, places the measuring device into the seabed sediment, and then detects the three-dimensional spatial distribution of seabed hydrate.

[0015] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a system diagram of an embodiment of a three-dimensional distribution detection device for seabed hydrates of the utility model;

[0017] Figure 2 This is a measurement principle diagram of a parallel plate capacitance sensor in an embodiment of a three-dimensional distribution detection device for seafloor hydrates of the utility model;

[0018] Figure 3 This is a measurement principle diagram of a flat-plate capacitance sensor in an embodiment of a three-dimensional distribution detection device for seafloor hydrates of the utility model;

[0019] Figure 4 It is an overall schematic diagram of a three-dimensional distribution detection device for seabed hydrates of the utility model. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0021] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figure 1-4 As shown, a three-dimensional distribution detection device for seabed hydrate includes a module part and a measuring unit part. The module part includes a capacitive sensor, a signal conditioning circuit, an A / D converter, a D / A converter, a single-chip microcomputer, a power amplifier, a wire connection module and a host computer.

[0023] Capacitive sensors include parallel plate capacitive sensors and flat plate capacitive sensors.

[0024] A parallel plate capacitive sensor consists of two parallel metal plates placed close to each other.

[0025] The flat plate capacitor sensor uses the edge effect of the capacitor to detect the capacitance of the object. The sensor consists of an excitation electrode, a sensing electrode and a substrate. The measurement principle diagram of the flat plate capacitor is shown in the figure below. Figure 3 As shown. A certain voltage is applied to the excitation electrode, and the induction plate is grounded. A spatial electric field is formed between the two plates. In a parallel capacitor, the electric field inside the capacitor is uniformly distributed, and the electric field lines are distributed in parallel straight lines. At the edge of the capacitor plates, the shape of the electrodes will be restricted, and the electric field lines will extend from the area between the plates to the external space. The electric field lines will change from parallel lines to open distribution, and the electric field distribution is concentrated at the edge of the plate. Therefore, when the capacitor plates are on the same side, the electric field lines will extend to a larger space to form an edge field using the above-mentioned edge effect.

[0026] The capacitive sensor is mounted on an insulating and corrosion-resistant dielectric substrate.

[0027] The capacitive sensor is placed in the sediment hydrate, and the excitation signal generated by the single chip microcomputer is loaded on the excitation electrode after passing through the D / A converter and the power amplifier.

[0028] The wire connection module selects the measurement unit by controlling the on and off of the multi-way switch.

[0029] The capacitance signal in the capacitance sensor is converted into a voltage signal through a signal conditioning circuit, and the voltage signal is converted into a digital signal through an A / D converter.

[0030] The microcontroller communicates with the host computer via USB.

[0031] In order to measure the dielectric constant and capacitance value of sediment hydrate, the capacitive sensor is placed in the sediment hydrate. The excitation signal generated by the microcontroller is loaded on the excitation electrode after DA conversion and power amplification. The wire connection module can select the measurement unit by controlling the on and off of the multi-way switch. The capacitance signal in the capacitance sensor can be converted into a voltage signal through the signal conditioning circuit. The voltage signal is converted into a digital signal through the A / D converter. The microcontroller communicates with the host computer through USB. The host computer can display the dielectric constant and capacitance value of each measurement unit measured online in real time. The obtained dielectric constant can be used to obtain the hydrate saturation through the relationship, thereby evaluating the abundance and uneven distribution of hydrates in seabed sediments.

[0032] The dielectric constant measurement unit section includes measurement unit A, measurement unit B, measurement unit C and measurement unit D. Each measurement unit consists of two pairs of capacitors.

[0033] The measuring device is placed in the seabed sediment. The measuring device consists of four measuring units. Measuring unit A and measuring unit C are exposed above the water surface and arranged in the bottom seawater, while measuring unit B and measuring unit D are inserted into the seabed sediment. Then the three-dimensional spatial distribution of seabed hydrates is detected.

[0034] Therefore, the utility model adopts a three-dimensional distribution detection device of seabed hydrate of the above structure, places the measuring device into the seabed sediment, and then detects the three-dimensional spatial distribution of seabed hydrate.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. A three-dimensional distribution detection device for seabed hydrate, characterized in that: The invention comprises a module part and a measuring unit part, wherein the module part comprises a capacitance sensor, a signal conditioning circuit, an A / D converter, a D / A converter, a single-chip microcomputer, a power amplifier, a wire connection module and a host computer, and the measuring unit part comprises a measuring unit A, a measuring unit B, a measuring unit C and a measuring unit D; the capacitance sensor comprises a parallel plate capacitance sensor and a flat plate capacitance sensor, and the capacitance sensor is installed on an insulating and corrosion-resistant dielectric substrate; each of the measuring units consists of two pairs of capacitors; the capacitance sensor is placed in sediment hydrate, and the excitation signal generated by the single-chip microcomputer is loaded on the excitation electrode after passing through the D / A converter and the power amplifier; the wire connection module selects the measuring unit by controlling the on and off of the multi-way switch; the capacitance signal in the capacitance sensor is converted into a voltage signal through the signal conditioning circuit, and the voltage signal is converted into a digital signal through the A / D converter; the single-chip microcomputer communicates with the host computer through a USB.

2. A three-dimensional distribution detection device for seabed hydrate according to claim 1, characterized in that: The measuring device is placed in the seabed sediment, and the measuring device consists of four measuring units. The measuring unit A and the measuring unit C are exposed above the water surface and arranged in the bottom seawater, and the measuring unit B and the measuring unit D are inserted into the seabed sediment, and then the three-dimensional spatial distribution of the seabed hydrate is detected.

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