Deep sea drilling in-situ observation device

Abstract

A deep sea drilling in-situ observation device disclosed by the present invention comprises an in-hole in-situ observation module, the in-hole in-situ observation module comprises an observation unit and a data acquisition unit, the observation unit comprises a pressure-resistant shell I, a coupling weight is arranged at the bottom end of the pressure-resistant shell I, and a fixing structure is fixedly connected in the pressure-resistant shell I; a pressure sensor, a temperature sensor and an acceleration sensor are placed in the first pressure-resistant shell, a watertight connector is fixedly connected in the first pressure-resistant shell, the data acquisition unit is fixedly connected to the upper end of the first pressure-resistant shell, and a drill rod connecting buckle and an ROV grabbing ring are fixedly connected to the data acquisition unit; the data control module comprises a second pressure-resistant shell, and a central control unit, a power management unit and a data storage unit are installed in the second pressure-resistant shell. The device can adapt to a high-pressure environment of deep sea water depth, and can realize synchronous and automatic observation and recording of multi-physical field changes of deep sea bottom sediment vibration-temperature-pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of deep sea monitoring, and in particular to a deep sea drilling in-situ observation device. Background Art

[0002] As marine engineering advances into the deep sea, the importance of deep-sea monitoring to marine engineering is becoming increasingly prominent. In-situ long-term, continuous, and fixed-point observation of the deep seabed is an important means of conducting deep-sea research, revealing the dynamic response of sediments under the action of deep-sea dynamics. At present, there are two methods for deep-sea in-situ observation: one is drill pipe detection, on which test sensors are installed. The drill pipe is drilled into the seabed sediments and separated by packers for in-situ observation. However, it is large in size and not suitable for long-term observation, and the observation cost is high; the other is a penetrating seabed probe (rod), which penetrates the seabed sediments. Sensors are installed in the probe (rod). Drill pipe detection can reach a certain depth, which is convenient for deployment and recovery. The penetrating seabed probe (rod) is limited to water depth and the probe is mostly beneficial for observation in a single environment.

[0003] Therefore, a deep-sea drilling in-situ observation device is proposed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide an in-situ observation device for deep-sea drilling to solve the problems existing in the above-mentioned prior art. The present invention can adapt to the high-pressure environment of deep-sea water and can realize the synchronous automatic observation and recording of the multi-physical field changes of deep-sea seabed sediments such as shock, temperature and pressure.

[0005] To achieve the above object, the present invention provides the following solution: The present invention provides a deep-sea drilling in-situ observation device, comprising: An in-hole in-situ observation module, the in-hole in-situ observation module comprises an observation unit and a data acquisition unit, the observation unit comprises a pressure-resistant shell 1, a coupling weight is arranged at the bottom end of the pressure-resistant shell 1, a fixed structure is fixedly connected in the pressure-resistant shell 1, a pressure sensor, a temperature sensor and an acceleration sensor are placed in the pressure-resistant shell 1, a watertight connector is fixedly connected in the pressure-resistant shell 1, the data acquisition unit is fixedly connected to the upper end of the pressure-resistant shell 1, the pressure sensor, the temperature sensor and the acceleration sensor are electrically connected to a serial bus, the serial bus is electrically connected to a watertight connector 1, the watertight connector 1 is fixedly connected in the pressure-resistant shell 1, the end of the watertight connector 1 away from the serial bus is electrically connected to the data acquisition unit, and a drill pipe connection buckle and an ROV grab ring are fixedly connected to the data acquisition unit; A data control module, the data control module includes a pressure-resistant shell 2, a central control unit, a power management unit and a data storage unit are installed in the pressure-resistant shell 2, a data transmission communication beacon, a reflective recovery beacon and an acoustic communication unit are installed on the pressure-resistant shell 2, the data transmission communication beacon, the reflective recovery beacon and the acoustic communication unit are electrically connected to the central control unit, the data transmission communication beacon, the reflective recovery beacon, the acoustic communication unit and the central control unit are all electrically connected to the power management unit, and the central control unit is electrically connected to the data acquisition unit.

[0006] Preferably, the data acquisition unit includes a pressure-resistant shell three, the pressure-resistant shell three and the pressure-resistant shell one, the pressure-resistant shell three is installed with a watertight connector two, the pressure-resistant shell two is installed with a watertight connector three, and the watertight connector two and the watertight connector three are electrically connected.

[0007] Preferably, the acceleration sensor is packaged by a three-axis fixing member, and the three-axis fixing member is fixedly connected in the pressure-resistant shell.

[0008] Preferably, a low-power control chip, a high-precision clock chip, a high-precision ADS chip, a high-speed FLASH cache chip, and an RS232 / USB communication interface are installed in the pressure-resistant shell three.

[0009] Preferably, the data transmission communication buoy has a certain self-capacitance and is internally provided with a data storage chip, an Iridium communication chip and a floating material.

[0010] The present invention discloses the following technical effects: the invention has a simple and compact structure, solves the problem of long-term observation of multiple elements in the deep sea, can measure temperature, pressure and seismic signals simultaneously in one device, can adapt to the high-pressure environment of the deep sea, and realize dynamic observation of multiple physical fields of seabed sediments. The selection of sealing materials makes it suitable for long-term deep-sea observation. At the same time, the design of the electronic system takes into account the low power consumption performance of the special environment of the seabed and the simplicity of the overall system. In addition, the use of acoustic communication units and Iridium satellites for data communication ensures the reliability, stability and efficiency of data transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1This is a schematic diagram of the overall structure of the deep-sea drilling in-situ observation device of the present invention; Figure 2 This is a schematic diagram of the structure of the in-hole in-situ observation module of the present invention; Figure 3 This is a structural diagram of a data control module of the present invention; Figure 4 It is a cross-section and partial enlarged schematic diagram of the acceleration sensor of the present invention; Figure 5 This is a control block diagram of the system of the present invention; Figure 6 It is a flow chart of the data collection and transmission process of the present invention; Among them, 1. Coupling weight; 2. Acceleration sensor; 3. Pressure hull 1; 4. Pressure sensor; 5. Temperature sensor; 6. Serial bus; 7. Fixed structure; 8. Watertight connector 1; 9. Pressure hull 3; 10. Drill pipe connection buckle; 11. ROV grab ring; 12. Watertight connector 2; 13. Watertight connector 3; 14. Pressure hull 2; 15. Data transmission communication buoy; 16. Reflective recovery beacon; 17. Acoustic communication unit; 18. Data control module; 19. Data acquisition unit; 20. Observation unit; 21. In-situ observation module in the hole. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Reference Figure 1-6 The present invention provides a deep-sea drilling in-situ observation device, comprising: An in-hole in-situ observation module 21, the in-hole in-situ observation module 21 includes an observation unit 20 and a data acquisition unit 19, the observation unit 20 includes a pressure-resistant shell 3, a coupling weight 1 is arranged at the bottom end of the pressure-resistant shell 3, a fixed structure 7 is fixedly connected in the pressure-resistant shell 3, a pressure sensor 4, a temperature sensor 5 and an acceleration sensor 2 are placed in the pressure-resistant shell 3, a watertight connector is fixedly connected in the pressure-resistant shell 3, the data acquisition unit 19 is fixedly connected to the upper end of the pressure-resistant shell 3, the pressure sensor 4, the temperature sensor 5 and the acceleration sensor 2 are electrically connected to the serial bus 6, the serial bus 6 is electrically connected to a watertight connector 8, the watertight connector 8 is fixedly connected in the pressure-resistant shell 3, the end of the watertight connector 8 away from the serial bus 6 is electrically connected to the data acquisition unit 19, and the data acquisition unit 19 is fixedly connected to a drill pipe connection buckle 10 and an ROV grab ring 11; The data control module 18 includes a pressure-resistant shell 14, in which a central control unit, a power management unit and a data storage unit are installed. The pressure-resistant shell 14 is provided with a data transmission communication beacon 15, a reflective recovery beacon 16 and an acoustic communication unit 17. The data transmission communication beacon 15, the reflective recovery beacon 16 and the acoustic communication unit 17 are electrically connected to the central control unit. The data transmission communication beacon 15, the reflective recovery beacon 16, the acoustic communication unit 17 and the central control unit are all electrically connected to the power management unit. The central control unit is electrically connected to the data acquisition unit 19.

[0016] In this device, the coupling weight 1 is connected to the pressure-resistant shell 3 by electromagnetic suction. After reaching the observation depth, the coupling weight 1 is powered off and demagnetized and falls into the hole, realizing the complete coupling between the coupling weight and the bottom of the borehole. The sensor array unit of the acceleration sensor 2, pressure sensor 4 and temperature sensor 5 in the observation unit 20 will be lowered under the action of gravity as the coupling weight 1 falls. Because the serial bus 6 connected to the sensor array unit has a certain margin in the cabin, it stretches during the lowering process, realizing the maximum lowering of the sensor array unit, thereby forming an observation array of the maximum length. At the same time, the fixed structure 7 ensures the vertical posture of the lowering of the sensor array unit. The acceleration sensor 2, pressure sensor 4 and temperature sensor 5 in the observation unit 20 have a sensor array unit with an expandable number of channels. Multi-channel sensor array unit data acquisition is realized.

[0017] A sensor array unit including a pressure sensor 4, a temperature sensor 5 and an acceleration sensor 2 is arranged in the pressure-resistant shell 3. The sensor array unit is limited by a fixed structure 7. The sensor array unit is connected to a data acquisition circuit board in the pressure-resistant shell 9 via a serial bus 6 and a watertight connector 8. The device has a simple and compact structure and is highly integrated. It can be connected to the drill pipe via a drill pipe connecting buckle 10 and fixed with a pin so that it can be placed in the borehole by a drilling rig. At the same time, the ROV can also be operated to grab the ROV grab ring 11 at the top to insert the device into the hole. At the same time, since the diameter of the shell at the data acquisition unit 19 is larger than the diameter of the borehole, it can be stuck on the seabed to prevent the entire device from falling into the hole, thereby realizing the observation of seabed sediments by the device.

[0018] The data control module 18 is provided with an acoustic communication unit 17, which can communicate with the water surface so as to realize two-way communication between the shore base, the water surface and the observation system.

[0019] According to a further optimization scheme, the data acquisition unit 19 includes a pressure-resistant shell three 9, the pressure-resistant shell three 9 and the pressure-resistant shell one 3, a watertight connector two 12 is installed on the pressure-resistant shell three 9, a watertight connector three 13 is installed on the pressure-resistant shell two 14, and the watertight connector two 12 and the watertight connector three 13 are electrically connected.

[0020] The data acquisition unit 19 is also provided with a high-precision clock chip to provide an accurate time stamp for the collected data. The data acquisition unit 19 is connected to the control unit in each sensor through the serial bus 6, and controls and collects the data of each sensor and temporarily stores the collected data in the FLASH cache chip. The acquired data is packaged through the cache chip and the data packet is sent to the data control module 18 through the watertight connector 2 12 and the watertight connector 3 13. At the same time, the data acquisition unit 19 distributes electrical energy to each sensor array unit.

[0021] According to a further optimized solution, the acceleration sensor is packaged by a three-axis fixture, and the three-axis fixture is fixedly connected in a pressure-resistant shell.

[0022] like Figure 3 As shown, the acceleration sensor 2 in the observation unit 20 is packaged with a three-axis fixture, and three acceleration sensors are installed in the xyz directions of the equiangular three-axis fixture to achieve real-time observation of seabed vibration signals.

[0023] To further optimize the solution, a low-power control chip, a high-precision clock chip, a high-precision ADS chip, a high-speed FLASH cache chip, and an RS232 / USB communication interface are installed in the pressure-resistant casing 3 9.

[0024] The low-power control chip samples a 32-bit low-power core chip, and the high-precision ADC chip uses a 24-bit, up to 128kSPS synchronous ADC.

[0025] To further optimize the solution, the data transmission communication buoy 15 has a certain self-capacitance of electrical energy and is equipped with a data storage chip, an Iridium communication chip and a floating material.

[0026] The data storage chip uses a large-capacity MicroSD card. The data transmission communication buoy 15 can float to the surface for communication. The number of data transmission communication buoys 15 can be determined according to the required transmission volume and transmission frequency. One data transmission communication buoy 15 is floated for each data transmission.

[0027] The central control unit pre-processes the sensor data obtained from the data acquisition unit 19, performs polynomial fitting on the acceleration, temperature and pressure data to remove the influence of seabed noise and circuit noise, performs FFT-RLS processing on the real-time acceleration data to obtain real-time vibration state data, and finally sends the processed data to the data transmission communication buoy 15 through the acoustic communication unit 17. The power management unit provides power to the device.

[0028] like Figure 5 As shown, in order to meet the special operating environment of the seabed, the data acquisition unit 19 adopts a low-power chip, and the data acquisition unit 19 communicates with the sensor array unit in an "inquiry" manner. Every time a certain time limit is reached, if the data acquisition unit 19 is ready, it sends a start signal to the sensor array unit and waits for the sensor array unit to respond. The sensor array unit receives the start signal and sends a response signal. The data acquisition unit 19 sends the data storage register address to the sensor array unit, and the sensor array unit starts to send data to the register address. At the same time, sufficient address space will be reserved inside the chip to meet the requirements of redundant design. When the data cache chip in the data acquisition unit 19 reaches the threshold, it will send a transmission signal to the central controller. The central controller receives the transmission signal and exits the sleep mode, and at the same time sends a response signal to the data acquisition unit 19 to prepare to receive the data packet. After receiving the response signal, the data acquisition unit 19 starts to send data to the central controller. This mode greatly reduces the power consumption of the overall system and is suitable for data acquisition and transmission in special seabed environments.

[0029] The data control module 18 is provided with a reflective recovery beacon 16 to facilitate recovery by the underwater robot.

[0030] All data transmission buoys float up, and after data transmission is completed, the data control module 18 can be recovered by deploying ROV, and the in-hole in-situ observation module 21 is abandoned on the seabed.

[0031] The present invention can adapt to the high-pressure environment of deep sea water, and can realize the synchronous automatic observation and recording of the multi-physical field changes of deep seabed sediments, including shock, temperature and pressure. The observation content includes the real-time vibration state of the seabed sediments; the temperature and pressure state changes of the sediments at different positions; at the same time, the observation system has a sensor array unit with an expandable number of channels, which can flexibly measure the state changes of various physical quantities.

[0032] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A deep-sea drilling in-situ observation device, characterized in that: include: An in-hole in-situ observation module (21), the in-hole in-situ observation module (21) comprising an observation unit (20) and a data acquisition unit (19), the observation unit (20) comprising a pressure-resistant shell (3), a coupling weight (1) being arranged at the bottom end of the pressure-resistant shell (3), a fixed structure (7) being fixedly connected inside the pressure-resistant shell (3), a pressure sensor (4), a temperature sensor (5) and an acceleration sensor (2) being arranged inside the pressure-resistant shell (3), a watertight connector being fixedly connected inside the pressure-resistant shell (3), and the data acquisition unit (19) being fixedly connected inside the pressure-resistant shell (3). The pressure sensor (4), the temperature sensor (5) and the acceleration sensor (2) are electrically connected to a serial bus (6), the serial bus (6) is electrically connected to a watertight connector (8), the watertight connector (8) is fixedly connected inside the pressure hull (3), the end of the watertight connector (8) away from the serial bus (6) is electrically connected to the data acquisition unit (19), and the data acquisition unit (19) is fixedly connected to a drill pipe connection buckle (10) and an ROV grab ring (11); A data control module (18), the data control module (18) comprising a second pressure-resistant shell (14), a central control unit, a power management unit and a data storage unit being installed in the second pressure-resistant shell (14), a data transmission communication buoy (15), a reflective recovery beacon (16) and an acoustic communication unit (17) being installed on the second pressure-resistant shell (14), the data transmission communication buoy (15), the reflective recovery beacon (16) and the acoustic communication unit (17) being electrically connected to the central control unit, the data transmission communication buoy (15), the reflective recovery beacon (16), the acoustic communication unit (17) and the central control unit being electrically connected to the power management unit, and the central control unit being electrically connected to the data acquisition unit (19).

2. The deep-sea drilling in-situ observation device according to claim 1, characterized in that: The data acquisition unit (19) comprises a pressure-resistant shell three (9), the pressure-resistant shell three (9) and the pressure-resistant shell one (3), the pressure-resistant shell three (9) is provided with a watertight connector two (12), the pressure-resistant shell two (14) is provided with a watertight connector three (13), and the watertight connector two (12) and the watertight connector three (13) are electrically connected.

3. The deep-sea drilling in-situ observation device according to claim 1, characterized in that: The acceleration sensor is packaged by a three-axis fixing member, and the three-axis fixing member is fixedly connected in the pressure-resistant shell.

4. The deep-sea drilling in-situ observation device according to claim 2, characterized in that: The pressure-resistant shell three (9) is equipped with a low-power control chip, a high-precision clock chip, a high-precision ADS chip, a high-speed FLASH cache chip, and an RS232 / USB communication interface.

5. The deep-sea drilling in-situ observation device according to claim 1, characterized in that: The data transmission communication buoy (15) has a certain self-capacitance of electrical energy and is internally provided with a data storage chip, an Iridium communication chip and a floating body material.

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