Ocean sediment in-situ multi-parameter measuring device

Abstract

The utility model discloses a marine sediment in-situ multi-parameter measuring device which comprises an insulating shell and a main control module installed in the shell, a conductivity measuring unit is embedded in the outer side of the shell, a heat conductivity measuring unit is further arranged in the shell, and the conductivity measuring unit and the heat conductivity measuring unit are respectively and electrically connected with the main control module. The device has the beneficial effects that the conductivity measuring unit is embedded in the outer side of the insulating shell, the heat conductivity measuring unit is arranged in the shell, the conductivity measuring unit and the heat conductivity measuring unit are used for respectively detecting the conductivity and the heat conductivity of the ocean sediment, and the acquired data are sent to the main control module for real-time processing; and the synchronous monitoring capability of the device is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to marine sediment in situ detection technical field especially relates to a marine sediment in situ multi -parameter measuring device. BACKGROUND

[0002] Natural gas hydrate mainly distributes in the marine sediment of continental margin and the underground of permafrost region, exists in solid form under the condition of low temperature and high pressure, and has extremely high development potential in exploitation. However, the occurrence state and exploitation process of natural gas hydrate can cause the significant change of the physical property of marine sediment. Therefore, the in situ monitoring of these physical parameters in marine sediment becomes one of the key technologies in the exploitation process of natural gas hydrate.

[0003] The exploitation of natural gas hydrate can involve the change of sediment temperature and pressure, can lead to the decomposition of hydrate, and then release methane gas, and in this process, there is significant heat effect and conductivity change. Therefore, the accurate measurement and real-time monitoring of the conductivity and thermal conductivity in marine sediment can not only better understand the reserves, occurrence state and stability of natural gas hydrate, but also can predict and control the heat transfer and sediment stability in the exploitation process, and prevent the occurrence of geological disasters such as submarine sediment landslide.

[0004] At present, the traditional sediment measuring device is mainly single parameter measurement, lacks multi -parameter synchronous monitoring ability, and cannot comprehensively reflect the occurrence environment of natural gas hydrate and its dynamic change in the exploitation process. In view of the multi -parameter measurement demand of natural gas hydrate reservoir, a device capable of real-time synchronous measurement of conductivity and thermal conductivity under the in situ condition of sediment is urgently needed, which provides scientific basis for safe and efficient exploitation of hydrate. UTILITY MODEL CONTENT

[0005] In view of the above problems, the utility model provides a marine sediment in situ multi -parameter measuring device, which synchronously measures the conductivity and thermal conductivity with high precision under the in situ condition of marine sediment, so as to provide key data support for the exploration, exploitation and environmental safety evaluation of natural gas hydrate.

[0006] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0007] A marine sediment in situ multi -parameter measuring device, comprising an insulating shell, and a main control module installed in the shell, an electrical conductivity measuring unit is embedded on the outside of the shell, and a thermal conductivity measuring unit is further arranged in the shell, and the electrical conductivity measuring unit and the thermal conductivity measuring unit are electrically connected with the main control module.

[0008] In some embodiments, the housing includes at least a conical tip, a first receiving cylinder, and a second receiving cylinder of the same diameter connected in sequence, wherein the bottom of the second receiving cylinder is closed.

[0009] In some embodiments, the conductivity measuring unit includes a first conductive ring, a second conductive ring, a third conductive ring, and a fourth conductive ring, wherein the first conductive ring and the second conductive ring are embedded at the junction of the cone tip and the first receiving cylinder, and the third conductive ring and the fourth conductive ring are embedded at the junction of the first receiving cylinder and the second receiving cylinder.

[0010] In some embodiments, the thermal conductivity measuring unit includes a heating tube and a thermocouple.

[0011] In some embodiments, the heating element and the thermocouple are respectively in close contact with the inner wall of the housing.

[0012] In some embodiments, the main control module includes an STM32 microcontroller module, a power supply module, and an auxiliary module. The excitation port of the STM32 microcontroller module is connected to the first conductive ring and the fourth conductive ring, respectively. The detection port of the STM32 microcontroller module is connected to the second conductive ring and the third conductive ring, respectively. The control port and the signal receiving port of the STM32 microcontroller module are connected to the heating tube and the thermocouple, respectively.

[0013] In some embodiments, the housing is made of ceramic.

[0014] In some embodiments, the conductivity measuring unit is made of copper.

[0015] The beneficial effects of this utility model are as follows: by embedding an electrical conductivity measuring unit on the outside of the insulated shell and setting a thermal conductivity measuring unit inside the shell, the electrical conductivity and thermal conductivity of marine sediments are detected by the electrical conductivity measuring unit and the thermal conductivity measuring unit respectively, and the acquired data is sent to the main control module for real-time processing, thereby enhancing the synchronous monitoring capability of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the in-situ multi-parameter measurement device for marine sediments disclosed in an embodiment of this utility model;

[0017] Figure 2 This is a cross-sectional view of the in-situ multi-parameter measurement device for marine sediments disclosed in this embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the system hardware circuit for the main control module;

[0019] Figure 4This is the system program flowchart for the main control module. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer and more explicit, the content of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0021] This embodiment proposes an in-situ multi-parameter measurement device for marine sediments, including an insulated housing and a main control module installed inside the housing. An electrical conductivity measurement unit is embedded on the outside of the housing, and a thermal conductivity measurement unit is also provided inside the housing. The electrical conductivity measurement unit and the thermal conductivity measurement unit are electrically connected to the main control module, respectively.

[0022] In this embodiment, by embedding an electrical conductivity measuring unit on the outside of the insulated housing and setting a thermal conductivity measuring unit inside the housing, the electrical conductivity and thermal conductivity of marine sediments are detected by the electrical conductivity measuring unit and the thermal conductivity measuring unit, respectively. The acquired data is sent to the main control module for real-time processing, thereby enhancing the synchronous monitoring capability of the device.

[0023] like Figure 1 and 2 As shown, the aforementioned housing includes at least a conical tip 101, a first receiving cylinder 104, and a second receiving cylinder 107 of the same diameter connected in sequence, wherein the bottom of the second receiving cylinder 107 is closed. The conical tip 101 is designed at 60°, which is more conducive to insertion into the sediment layer. The cylindrical space formed by the combination of the first receiving cylinder 104 and the second receiving cylinder 107 is used to install the aforementioned thermal conductivity measurement unit and main control module.

[0024] Specifically, the conductivity measuring unit includes a first conductive ring 102, a second conductive ring 103, a third conductive ring 105, and a fourth conductive ring 106. The first conductive ring 102 and the second conductive ring 103 are embedded at the junction of the cone tip 101 and the first receiving cylinder 104, while the third conductive ring 105 and the fourth conductive ring 106 are embedded at the junction of the first receiving cylinder 104 and the second receiving cylinder 107. All the conductive rings are embedded to ensure that they do not protrude from the outer edges of the first receiving cylinder 104 and the second receiving cylinder 107, thus avoiding increasing the downward pressure on the device. More preferably, the conductivity measuring unit can be made of copper, consisting of four conductive copper rings, and uses a four-electrode method to measure conductivity. Internal wires are welded to the unit, which can pass through the probe and connect to the main control unit 110.

[0025] Optionally, the thermal conductivity measurement unit includes a heating tube 108 and a thermocouple 109. During installation, the heating tube 108 and thermocouple 109 need to be tightly attached to the inner wall of the housing. The housing can be made of ceramic, which is corrosion-resistant and essentially non-conductive, but has good thermal conductivity to ensure measurement stability. During use, the main control unit 110 excites the heating tube 108 to generate heat. The heat is transferred to the deposit layer through the housing. The thermocouple 109 measures the temperature change in real time and returns the data to the main control unit 110. The main control unit 110 records the temperature rise data at a specific time after heating begins and calculates the thermal diffusivity according to the heat transfer equation, thereby obtaining the thermal conductivity.

[0026] Optionally, the main control module 110 includes an STM32 microcontroller module, a power supply module, and an auxiliary module. The excitation port of the STM32 microcontroller module is connected to the first conductive ring 102 and the fourth conductive ring 106, respectively. The detection port of the STM32 microcontroller module is connected to the second conductive ring 103 and the third conductive ring 105, respectively. The control port and the signal receiving port of the STM32 microcontroller module are connected to the heating tube 108 and the thermocouple 109, respectively.

[0027] More specifically, the system hardware circuit configuration of the main control module 110 is as follows: Figure 3 As shown, the main components include a power supply circuit, an auxiliary module circuit, and a main function module circuit. The power supply circuit generates 12V, ±5V, 3.3V, and 2.5V voltages to power the auxiliary and main function module circuits. The auxiliary module circuit includes a clock crystal oscillator module and a reset module, used to provide clock pulses and system reset functions for the main function module. The main function module circuit includes an STM32 microcontroller module, a data storage module, a serial communication module, a conductivity acquisition module, a conductivity excitation module, a heating module, and a temperature acquisition module. The STM32 microcontroller module is responsible for controlling the transmission and reception communication with the host computer, and also for sending enable signals, pulse signals, and synchronization signals to the conductivity excitation module, controlling the excitation module to send sinusoidal pulse signals to the electrodes. In addition, it needs to send an enable signal to the heating module to control its heating time. It also needs to sequentially acquire conductivity voltage data and temperature data. The data storage module is responsible for storing the conductivity voltage data and temperature data acquired by the microcontroller.

[0028] The system program flowchart of the main control module 110 is as follows: Figure 4As shown. First, initialization is required. After calling the initialization command, a self-test process is performed, waiting for all peripherals to complete initialization before entering the main loop program. Then, the system "enables the conductivity excitation module," activating the DDS signal generator chip and outputting a sine wave signal. Subsequently, the system "acquires conductivity voltage signals" and "stores conductivity voltage data" to prepare for subsequent analysis. After conductivity measurement, the process shifts to temperature control, adjusting the heating time of the heating tube by "enabling the heating tube control module." The system then "acquires thermocouple temperature signals" and "stores thermocouple temperature data" to ensure the accuracy of the temperature data. Finally, the system uses the previously stored conductivity and temperature data to "calculate conductivity and thermal conductivity."

[0029] The above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made based on the substance of the content of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A multi-parameter in-situ measurement device for marine sediments, characterized in that, The device includes an insulated housing and a main control module installed inside the housing. An electrical conductivity measuring unit is embedded on the outside of the housing, and a thermal conductivity measuring unit is also provided inside the housing. The electrical conductivity measuring unit and the thermal conductivity measuring unit are electrically connected to the main control module, respectively.

2. The in-situ multi-parameter measurement device for marine sediments as described in claim 1, characterized in that, The housing includes at least a conical tip, a first receiving cylinder, and a second receiving cylinder of the same diameter connected in sequence, wherein the bottom of the second receiving cylinder is closed.

3. The in-situ multi-parameter measurement device for marine sediments as described in claim 2, characterized in that, The conductivity measuring unit includes a first conductive ring, a second conductive ring, a third conductive ring, and a fourth conductive ring, wherein the first conductive ring and the second conductive ring are embedded in the junction of the cone tip and the first receiving cylinder, and the third conductive ring and the fourth conductive ring are embedded in the junction of the first receiving cylinder and the second receiving cylinder.

4. The in-situ multi-parameter measurement device for marine sediments as described in claim 2 or 3, characterized in that, The thermal conductivity measurement unit includes a heating tube and a thermocouple.

5. The in-situ multi-parameter measurement device for marine sediments as described in claim 4, characterized in that, The heating element and the thermocouple are respectively attached to the inner wall of the housing.

6. The in-situ multi-parameter measurement device for marine sediments as described in claim 4, characterized in that, The main control module includes an STM32 microcontroller module, a power supply module, and an auxiliary module. The excitation port of the STM32 microcontroller module is connected to the first conductive ring and the fourth conductive ring, respectively. The detection port of the STM32 microcontroller module is connected to the second conductive ring and the third conductive ring, respectively. The control port and the signal receiving port of the STM32 microcontroller module are connected to the heating tube and the thermocouple, respectively.

7. The in-situ multi-parameter measurement device for marine sediments as described in claim 1, characterized in that, The shell is made of ceramic.

8. The in-situ multi-parameter measurement device for marine sediments as described in claim 1, characterized in that, The conductivity measurement unit is made of copper.

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