CN113432641A - Be used for long-term multi-parameter monitoring devices of deep sea stratum - Google Patents
Be used for long-term multi-parameter monitoring devices of deep sea stratum Download PDFInfo
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- CN113432641A CN113432641A CN202110603097.5A CN202110603097A CN113432641A CN 113432641 A CN113432641 A CN 113432641A CN 202110603097 A CN202110603097 A CN 202110603097A CN 113432641 A CN113432641 A CN 113432641A
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Abstract
The invention discloses a long-term multi-parameter monitoring device for a deep sea stratum, which comprises a monitoring rod body, wherein a sensor driving sub-module and an in-situ sensor measuring sub-module are arranged in the monitoring rod body; the sensor driving sub-module comprises an underwater motor set and an eccentric support, a PH sensor, a pressure sensor and a temperature sensor are sequentially arranged on the eccentric support along the length direction of the monitoring rod body, openings are respectively formed in the monitoring rod body opposite to the PH sensor, the pressure sensor and the temperature sensor, and an output shaft of the underwater motor set is connected with the eccentric support through a coupler and used for laterally pushing out and returning detection ends of the PH sensor, the pressure sensor and the temperature sensor on the corresponding openings; the in-situ sensor measuring submodule comprises a methane sensor, a hydrogen sulfide sensor and a dissolved oxygen sensor which are sequentially arranged along the length direction of the monitoring rod body, and reticular holes are formed in the side wall of the monitoring rod body at the position of the in-situ sensor measuring submodule.
Description
Technical Field
The invention relates to the technical field of deep sea monitoring, in particular to a long-term multi-parameter monitoring device for a deep sea stratum.
Background
With the development of economy and the advancement of science and technology, resource problems are discussed continuously in the international society, and the world energy demand is increasing year by year. The non-renewable energy sources such as oil, coal and the like on the earth are increasingly exhausted along with continuous exploitation, about 70% of energy consumption is from fossil energy sources (oil, natural gas and coal) at present, and natural gas is cleaner compared with oil and coal, so that the non-renewable energy sources are main energy demand growth points in the future. The natural gas hydrate rich in reserves in marine sediments is considered as a strategic and alternative energy source for future cleanliness, and has attracted extensive attention and attention of the international society since the eighties of the last century.
Natural gas hydrate is an unconventional natural gas resource, conservatively estimated to have twice the carbon content of other fossil energy sources, and is considered as the most potential alternative energy source in the future around the world. According to the preliminary prediction of seismic data, the resource amount of the natural gas hydrate in the south China sea is about 800 million tons of oil equivalent, and the development of the natural gas hydrate in the south China sea is a national long-term energy development strategy. Although exploratory pilot mining and experimental pilot mining are carried out on natural gas hydrate resources in China, the difference from commercial mining is large, and a continuous, efficient and safe exploration technology is still the main target of natural gas hydrate development.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and design a device for monitoring multiple parameters of a deep sea stratum for a long time so as to realize the long-term multiple parameter monitoring of the deep sea stratum.
A long-term multi-parameter monitoring device for a deep sea stratum comprises a monitoring rod body, wherein a sensor driving sub-module and an in-situ sensor measuring sub-module are arranged in the monitoring rod body;
the sensor driving submodule comprises an underwater motor set and an eccentric support, a PH sensor, a pressure sensor and a temperature sensor are sequentially arranged on the eccentric support along the length direction of a monitoring rod body, openings are respectively formed in the monitoring rod body opposite to the PH sensor, the pressure sensor and the temperature sensor, and an output shaft of the underwater motor set is connected with the eccentric support through a coupler and used for laterally pushing out and returning detection ends of the PH sensor, the pressure sensor and the temperature sensor from the corresponding openings;
the in-situ sensor measuring submodule comprises a methane sensor, a hydrogen sulfide sensor and a dissolved oxygen sensor which are sequentially arranged along the length direction of the monitoring rod body, and a reticular hole is formed in the side wall of the monitoring rod body at the position of the in-situ sensor measuring submodule.
Preferably, a rod-to-rod near field communication sub-module is further arranged in the monitoring rod body and comprises a transmitting circuit and a receiving circuit; the transmitting circuit part comprises an analog multiplier, a circuit amplifying circuit and a program-controlled power amplifying circuit, and the receiving circuit comprises a locking amplifying circuit and a digital demodulating circuit; the transmitting circuit part is characterized in that data of each sensor in the monitoring rod body is sent to a microcontroller circuit, the microcontroller circuit outputs digital signals to enter an analog multiplier and a carrier signal to form modulation signals, the modulation signals are connected to a program-controlled power amplifying circuit through a voltage amplifying circuit to be output, and the modulation signals are transmitted through an RC (resistance-capacitance) matched transmitting coil; the receiving circuit part receives signals by a receiving coil and sends the signals to a locking amplifying circuit, and the locking amplifying circuit comprises a preamplification circuit, an analog switch PSD, a reference phase-shifting circuit and a band-pass filter circuit; the signal is output by the locking amplifying circuit, enters the digital demodulation circuit and finally outputs a digital signal.
Preferably, this internal pore water sample submodule that still is equipped with of monitoring lever, pore water sample submodule includes the piston, deposits water and protects and presses a section of thick bamboo and long pipe, the piston is installed and is deposited water and protect and press a section of thick bamboo and one end and eccentric leg joint, deposits water and protect a section of thick bamboo tip and pass through connector and long pipe one end intercommunication, and long pipe coils on the support frame, the long pipe other end and sample needle tubing are connected, the sample needle tubing is stretched out and is inserted the soil layer and draw back to this internally by the drive of underwater motor group from the monitoring lever.
Preferably, the main part of sample needle tubing is connected with the support frame of hole water sample submodule, and the support frame is connected with the motor group under water to seted up the sample trompil on the monitoring rod body that corresponds sample needle tubing free end tip position, motor group rotation drive support frame eccentric rotation under water makes the sample needle tubing inserts the soil layer and takes out to the monitoring rod body in. The sampling needle tube is provided with a plurality of.
Preferably, the eccentric support include eccentric wheel and backup pad, the eccentric wheel is connected with the backup pad, install in the backup pad PH sensor, pressure sensor and temperature sensor, the motor assembly is connected with the eccentric wheel through the shaft coupling under water, drives the eccentric wheel rotation, drives the backup pad and carries out eccentric motion.
Preferably, the water storage pressure maintaining cylinder comprises an end cover and a cylinder body, the piston penetrates through the end cover to be arranged in the cylinder body, the end cover is connected with the cylinder body in a sealing mode, and the end portion of the cylinder body is communicated with one end of the long guide pipe through a connector.
Preferably, the monitoring rod is a rigid rod.
Preferably, the monitoring rod body is 300 centimeters long, and the outer diameter of the monitoring rod body is 76 mm.
Preferably, both ends of the monitoring rod body are respectively provided with threads.
Preferably, the underwater electronic group comprises a linear motor and a rotating motor, an output shaft of the linear motor is connected with the rotating motor, and an output shaft of the rotating motor is connected with the eccentric support through a coupler.
The monitoring rod body is 300cm long, the pore water sampling submodule is eccentrically arranged on the drill rod before the drill rod is inserted into a soil layer, and the sampling needle tube is eccentrically driven to be inserted into the soil layer through the rotary motion of an underwater motor set positioned in the drill rod after the sampling position is reached.
The present application is further described below:
a long-term multi-parameter monitoring device for deep sea stratum, namely an integrated MEMS acceleration sensor, a temperature sensor, a pressure sensor, a methane sensor, a hydrogen sulfide sensor, a dissolved oxygen sensor and a PH sensor are arranged on a monitoring rod, and stratum data are obtained based on the monitoring rod, and the device comprises: temperature, pressure, deformation, fluid geochemical parameters, etc. Monitoring migration of fluids rich in geochemical parameters such as hydrocarbons, hydrogen sulfide and the like in the stratum in structures such as a fault; monitoring the process and the variable quantity of the formation deformation; the formation temperature and pressure are monitored, and the abnormity early warning capability is achieved; acquiring stratum activity microseismic information and acquiring secondary vibration signal data; forming a three-dimensional temperature and pressure field and a three-dimensional geochemical parameter distribution map.
Therefore, a long-term multi-parameter monitoring rod for the deep sea stratum (namely a long-term multi-parameter monitoring device for the deep sea stratum) is designed, and the research on the natural gas hydrate characteristics in China is promoted. The research result can be applied to monitoring of the natural gas hydrate, can be effectively popularized to other comprehensive marine survey projects, and has certain universality and popularization prospect.
In order to solve the technical problem, the solution of the invention is as follows:
the device comprises a rigid rod body, a pore water sampling submodule, an in-situ sensor measuring submodule, a sensor driving submodule and an inter-rod near-field communication submodule.
The rigid rod body is internally provided with a pore water sampling submodule, a sensor driving submodule and an inter-rod near-field communication submodule, the side edge of the rigid rod body is provided with an opening, and the two sides of the rigid rod body are provided with threads for butting the connected rigid rod body.
The pore water sampling submodule is developed mainly for obtaining high resolution, multi-level, airtight and pollution-free in-situ pore water sample in certain time. In order to improve the sampling resolution and the purity of the sample, a sampling head consisting of a porous hydrophilic filter membrane in the Rhizon soil solution sampler is used for sampling. The drill rod is driven by a motor carried in the drill rod to be inserted into the shallow stratum of the trial production area. The pore water sampling sub-module realizes high-resolution pore water pressure-maintaining sampling of the seabed time-sequenced space layer by arranging pore filtering capillaries in the stratum of the trial production area at high density. The function is mainly realized by combining three subsystems of a component device, wherein the three subsystems are a sampling module, a catheter storage device and a drawing system respectively. In order to avoid the pollution of other soil layers when the drill rod penetrates into a sediment soil layer, the pore water sampling submodule is eccentrically arranged in the drill rod (with the length of 300cm) before the drill rod is inserted into the soil layer, and the sampling needle tube is eccentrically driven to be inserted into the soil layer through the rotary motion of an underwater motor group positioned in the drill rod after the sampling position is reached. The underwater motor set consists of a linear motor and a rotating motor, and the rotating motor is connected to an output shaft of the linear motor, so that linear motion and rotating motion are realized. The sampling needle tubes are connected with the long guide tube by the aid of the quick-insertion connectors, the sampling needle tubes are gathered into the long guide tube (a long guide tube fork is divided into the sampling needle tubes, the sampling needle tubes are provided with a plurality of sampling needle tubes, one ends of the sampling needle tubes are respectively connected with the other end of the long guide tube through the quick-insertion connectors, an opening is formed in the monitoring rod body corresponding to the free end of each sampling needle tube, main bodies of the sampling needle tubes are respectively connected with the supporting frame, the supporting frame is driven by the underwater motor group to drive the sampling needle tubes to be inserted into and drawn back into the monitoring rod body, a fork structure is formed in the supporting frame between the sampling needle tubes and the long guide tube, the supporting frame is connected with the connectors and then connected to the underwater motor group through the cylinder, the end cover, the piston and the eccentric support frame, the underwater motor group rotates to drive the supporting frame wound with the long guide tube to rotate, and the supporting frame is eccentrically arranged, driving the sampling tube to be pumped into the ejection rigid rod body; as shown in fig. 2 and 4, the support frame of the pore water sampling submodule is of an eccentric design). The conduit storage device is in a form of storing samples in a long conduit, deionized water is filled in the long conduit in advance, the deionized water and the pore water sample cannot diffuse mutually according to the mass transfer theory, and after the final sampling is finished, the deionized water completely flows into a pressure maintaining cylinder in the drawing device, and the long conduit is completely filled with the pore water sample. The drawing system is mainly designed to provide power for pore water sampling, and the piston structure drives the piston rod to do linear motion by utilizing the linear motion of the underwater motor set so as to drive the piston to generate driving force. After sampling is finished, the underwater motor set drives the eccentric rotation to rotate, and the sampling needle tube is drawn back into the drill rod.
The in-situ measurement of the in-situ sensor measuring submodule and the gas sensors such as the methane sensor and the hydrogen sulfide sensor is realized, and the gas in the formation in situ enters the monitoring rod through meshes by opening the mesh holes on the side wall, so that the gas concentration is measured. The acquisition of dissolved oxygen data is achieved by measuring the seawater entering the interior of the monitoring rod.
The sensor driving submodule drives the eccentric wheel to rotate by the underwater motor set to drive the supporting plate to perform eccentric motion, so that the lateral push-out and return of the PH sensor, the pressure sensor and the temperature sensor are realized.
The rod-to-rod near field communication submodule is connected through electromagnetic coupling (ICL) communication, namely inductive coupling, and comprises a transmitting circuit and a receiving circuit. The data of each sensor in the drill bit is sent into a microcontroller circuit to output a digital signal, and the digital signal enters an analog multiplier and a carrier signal to form a modulation signal; the voltage amplifying circuit is connected to the program control power amplifying circuit to output and then the transmitting coil is transmitted out through the transmitting coil matched with the RC. In terms of circuit implementation, since magnetic flux varies with distance, power regulation, i.e., the programmable power amplification regulation circuit in fig. 6, should be adopted at the transmitting end to make the signal level at the receiving end relatively stable. The receiving circuit part receives signals from the receiving coil and sends the signals to the locking amplifying circuit; the locking amplifying circuit comprises a pre-amplifying circuit, an analog switch PSD, a reference phase-shifting circuit and a band-pass filter circuit; the signal is output by the locking amplifying circuit, enters the digital demodulation circuit and finally outputs a digital signal, and then is sent to a subsequent circuit for processing operation.
Furthermore, the device for monitoring the multiple parameters of the deep sea stratum for a long time is in butt joint through threads at two ends, so that the butt joint quantity can be increased according to working condition requirements.
Further, the sensors of the in-situ sensor measurement submodule can be replaced according to actual measurement requirements.
Furthermore, the device for monitoring the multiple parameters of the deep sea stratum for a long time is realized by arranging a deep sea stratum monitoring rod arrangement system, the monitoring rods are realized by modifying drill rods, and the drill rods have generally applicable sizes. In addition, the larger the drill rod size is, the larger the size of the corresponding deep sea stratum monitoring rod deployment system is, and the outer diameter of the monitoring rod is set to be a common size of 76mm or nearby by comprehensively considering the size of the deployment device and the size of the sensor.
Further, the preamplification circuit can be designed according to the result of ICL theoretical analysis. The locking amplifying circuit can reduce the interference of environmental noise, and radio frequency noise is increased when ICL is adopted to transmit signals; secondly, the signal is weak, and to achieve a sufficient signal-to-noise ratio, the bandwidth of the band-pass filter (i.e., the band-pass filter circuit) must be very narrow, the Q value must be very high, but the band-pass filter (i.e., the band-pass filter circuit) with the Q value too high is often not very stable, the temperature and the fluctuation of the power supply voltage can change the center frequency of the filter, and finally the system cannot work stably.
Compared with the prior art, the invention has the beneficial effects that:
(1) the rigid monitoring rod integrates a pressure sensor, a methane sensor, a hydrogen sulfide sensor, a dissolved oxygen sensor and a PH sensor, and is used for monitoring geochemical multi-parameter parameters of the stratum to generate a three-dimensional temperature and pressure field.
(2) The electromagnetic coupling technology is adopted for the inter-pole communication, the environmental adaptability is strong, the electromagnetic coupling communication can be used in any place where a magnetic field can penetrate, including severe environments such as seawater and mud, and the circuit can be used only by performing waterproof pressure-resistant treatment in deep sea operation.
(3) The sensor driving submodule is combined with an eccentric support and a side wall opening, and the problems of retraction and release of a sensor and a sampling tube in the in-situ stratum drill rod are solved. The in-situ detection is realized, and the accuracy and the scientificity of some engineering data which are difficult to measure are ensured to the maximum extent.
Drawings
FIG. 1 is an external schematic view of a device for long-term multi-parameter monitoring of deep sea formations provided by the present invention.
FIG. 2 is a schematic structural diagram of a device for monitoring multiple parameters of deep sea formations for a long time, provided by the invention.
Fig. 3 is a schematic structural diagram of a sensor driving submodule provided by the invention.
FIG. 4 is a schematic structural diagram of a pore water sampling submodule provided by the present invention.
FIG. 5 is a schematic structural diagram of an in-situ sensor measurement submodule provided by the present invention.
FIG. 6 is a schematic diagram of the inter-rod NFC submodule provided in the present invention.
In the figure: 1-a rigid rod body; 2-sensor drive submodule; 2-1-underwater motor group; 2-coupling; 2-3-eccentric support; 2-4-PH sensor; 2-5-pressure sensor; 2-6-temperature sensor; 3-pore water sampling submodule; 3-1-piston; 3-2-end cap; 3-cylinder; 3-4-a connector; 3-5-long catheter; 3-6-support frame; 4-an in-situ sensor measurement submodule; 4-1-methane sensor; 4-2-hydrogen sulfide sensor; 4-3-dissolved oxygen sensor; 5-an inter-rod near field communication sub-module.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the invention in any way.
As shown in fig. 1 and 2, the overall schematic diagram of the long-term multi-parameter monitoring device for deep sea strata according to the present invention comprises a rigid rod body 1, a sensor driving submodule 2, a pore water sampling submodule 3, an in-situ sensor measuring submodule 4, and an inter-rod near-field communication submodule 5. The sensor driving submodule 2, the pore water sampling submodule 3, the in-situ sensor measuring submodule 4 and the rod near-field communication submodule 5 are arranged inside the rigid rod body 1, holes are formed in the side edges of the rigid rod body, and threads are arranged on the two sides of the rigid rod body and used for butt joint of the rigid rod body 1. The long-term multi-parameter monitoring device for the deep sea stratum is in butt joint through threads at two ends, so that the butt joint quantity can be increased according to working condition requirements.
As shown in fig. 3, the structural schematic diagram of the sensor driving submodule 2 includes an underwater motor set 2-1, a coupler 2-2, an eccentric bracket 2-3, a PH sensor 2-4, a pressure sensor 2-5, and a temperature sensor 2-6. The underwater motor group 2-1 is connected with the eccentric support 2-3 through a coupler 2-2, specifically, the eccentric support 2-3 comprises an eccentric wheel and a support plate, one end of the eccentric wheel is connected with the support plate, the other end of the eccentric wheel is connected with the underwater motor group 2-1 through a coupler, specifically, the underwater motor group 2-1 comprises a linear motor and a rotating motor, an output shaft of the linear motor is connected with the rotating motor, and an output shaft of the rotating motor is connected with the other end of the eccentric wheel of the eccentric support through a coupler. PH sensors 2-4, pressure sensors 2-5 and temperature sensors 2-6 are sequentially arranged on the supporting plates of the eccentric supports 2-3 along the length direction of the rigid rod body 1, and the rigid rod body 1 opposite to the PH sensors 2-4, the pressure sensors 2-5 and the temperature sensors 2-6 is respectively provided with an opening. The underwater motor group 2-1 drives the eccentric support 2-3 to rotate, so that the detection ends of the PH sensor 2-4, the pressure sensor 2-5 and the temperature sensor 2-6 are pushed out and returned laterally on the corresponding openings.
As shown in fig. 4, the structure schematic diagram of the pore water sampling submodule 3 includes a piston 3-1, an end cover 3-2, a cylinder 3-3, a connector 3-4, a long conduit 3-5, and a support frame 3-6. The long catheter 3-5 is coiled on the support frame 3-6. The drawing module includes: the piston 3-1, the end cover 3-2, the cabin 3-3 and the connector 3-4 mainly provide power for pore water sampling. The water storage and pressure maintaining cylinder consists of a cylinder body 3-3 and an end cover 3-2, the end cover 3-2 is hermetically connected with the cylinder body 3-3, a piston 3-1 penetrates through the end cover and is arranged in the cylinder body 3-3, and the piston 3-1 is connected with an underwater motor set 2-1 through an eccentric support 2-3. The end part of the cylinder 3-3 is communicated with one end of a long conduit 3-5 through a connector 3-4, the long conduit 3-5 is coiled on a support frame 3-6, the other end of the long conduit 3-5 is connected with a sampling needle tube, and the sampling needle tube is used for extending out of the rigid rod body, is driven by an underwater motor group to be inserted into a soil layer and is drawn back into the rigid rod body. Specifically, the main body of the sampling needle tube is connected with a support frame 3-6, the support frame 3-6 is connected with a cylinder 3-3 through a joint 3-4, the cylinder 3-3 is connected with a support plate of an eccentric support 2-3 through a piston 3-1, so that the support frame 3-6 is connected with an underwater motor set 2-1, and the rigid rod body corresponding to the end position of the free end of the sampling needle tube is provided with a sampling open hole, the pore water sampling submodule 3 is eccentrically arranged in the rigid rod body 1 before the rigid rod body 1 is inserted into a soil layer, the sampling needle tube is eccentrically driven to stretch out from the sampling open hole to be inserted into the soil layer through the rotary motion of the underwater motor set 2-1 positioned in the rigid rod body 1 after reaching the sampling position, and the sampling needle tube is drawn back into the rigid rod body 1 by the eccentric rotation of the support frame rotationally driven by the underwater motor set after sampling is completed. And finally, after the sampling is finished, the deionized water completely flows into a water storage pressure-maintaining cylinder in the drawing device, and the long guide pipe 3-5 is completely filled with a pore water sample.
As shown in FIG. 5, the in-situ sensor measurement submodule 4 includes a methane sensor 4-1, a hydrogen sulfide sensor 4-2, and a dissolved oxygen sensor 4-3. The methane sensor 4-1, the hydrogen sulfide sensor 4-2 and the dissolved oxygen sensor 4-3 are sequentially arranged in the rigid rod body 1 along the length direction of the rigid rod body 1, in-situ measurement of the methane sensor 4-1 and the hydrogen sulfide sensor 4-2 is achieved, and gas in the formation in-situ enters the monitoring rod through meshes by forming the meshes on the side wall of the rigid rod body to measure the gas concentration. The data acquisition of the dissolved oxygen sensor 4-3 is realized by measuring the seawater entering the monitoring rod body.
As shown in fig. 6, the schematic diagram of the rod-to-rod near field communication submodule 5 is shown. The rod-to-rod near field communication submodule 5 is connected by electromagnetic coupling (ICL) communication, namely inductive coupling, and comprises a transmitting circuit and a receiving circuit. In the transmitting circuit part, data of each sensor in a drill bit (namely a rigid rod body) is sent into a microcontroller circuit, and the microcontroller circuit outputs a digital signal to enter an analog multiplier and a carrier signal to form a modulation signal; the voltage amplifying circuit is connected to the program control power amplifying circuit to output and then the transmitting coil is transmitted out through the transmitting coil matched with the RC. In terms of circuit implementation, since magnetic flux varies with distance, power regulation, i.e., the programmable power amplification regulation circuit in fig. 6, should be adopted at the transmitting end to make the signal level at the receiving end relatively stable. The receiving circuit part receives signals from the receiving coil and sends the signals to the locking amplifying circuit; the locking amplifying circuit comprises a pre-amplifying circuit, an analog switch PSD, a reference phase-shifting circuit and a band-pass filter circuit; the signal is output by the locking amplifying circuit, enters the digital demodulation circuit and finally outputs a digital signal, and then is sent to a subsequent circuit for processing operation.
Finally, it should be noted that the above-mentioned list is only a specific embodiment of the present invention. It is obvious that the present invention is not limited to the above embodiments, but many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (10)
1. A long-term multi-parameter monitoring device for deep sea stratum is characterized in that: the monitoring rod comprises a monitoring rod body, wherein a sensor driving submodule and an in-situ sensor measuring submodule are arranged in the monitoring rod body;
the sensor driving submodule comprises an underwater motor set and an eccentric support, a PH sensor, a pressure sensor and a temperature sensor are sequentially arranged on the eccentric support along the length direction of a monitoring rod body, openings are respectively formed in the monitoring rod body opposite to the PH sensor, the pressure sensor and the temperature sensor, and an output shaft of the underwater motor set is connected with the eccentric support through a coupler and used for laterally pushing out and returning detection ends of the PH sensor, the pressure sensor and the temperature sensor from the corresponding openings;
the in-situ sensor measuring submodule comprises a methane sensor, a hydrogen sulfide sensor and a dissolved oxygen sensor which are sequentially arranged along the length direction of the monitoring rod body, and a reticular hole is formed in the side wall of the monitoring rod body at the position of the in-situ sensor measuring submodule.
2. The deep sea formation long-term multi-parameter monitoring device according to claim 1, characterized in that: the monitoring rod body is also internally provided with an inter-rod near field communication submodule which comprises a transmitting circuit and a receiving circuit; the transmitting circuit part comprises an analog multiplier, a circuit amplifying circuit and a program-controlled power amplifying circuit, and the receiving circuit comprises a locking amplifying circuit and a digital demodulating circuit; the transmitting circuit part is characterized in that data of each sensor in the monitoring rod body is sent to a microcontroller circuit, the microcontroller circuit outputs digital signals to enter an analog multiplier and a carrier signal to form modulation signals, the modulation signals are connected to a program-controlled power amplifying circuit through a voltage amplifying circuit to be output, and the modulation signals are transmitted through an RC (resistance-capacitance) matched transmitting coil; the receiving circuit part receives signals by a receiving coil and sends the signals to a locking amplifying circuit, and the locking amplifying circuit comprises a preamplification circuit, an analog switch PSD, a reference phase-shifting circuit and a band-pass filter circuit; the signal is output by the locking amplifying circuit, enters the digital demodulation circuit and finally outputs a digital signal.
3. The deep sea formation long-term multi-parameter monitoring device according to claim 1, characterized in that: this internal hole water sample submodule that still is equipped with of monitoring lever, hole water sample submodule includes the piston, deposits water and protects a section of thick bamboo and long pipe, the piston is installed and is deposited water and protect to press in the section of thick bamboo and one end and eccentric leg joint, deposits water and protect a section of thick bamboo tip and pass through connector and long pipe one end intercommunication, and long pipe coils on the support frame, the long pipe other end is connected with the sample needle tubing, the sample needle tubing is by the drive of underwater motor group from this internal stretching out of monitoring lever and insert the soil layer and take back to this internally of monitoring lever.
4. The deep sea formation long-term multi-parameter monitoring device according to claim 3, wherein: the main part of sample needle tubing is connected with the support frame of hole water sample submodule, and the support frame is connected with the motor assembly under water to seted up the sample trompil on the monitoring rod body that corresponds sample needle tubing free end tip position, motor assembly rotary drive support frame eccentric rotation under water makes the sample needle tubing inserts the soil layer and takes out to this internally to the monitoring rod.
5. The deep sea formation long-term multi-parameter monitoring device according to claim 1, characterized in that: the eccentric support comprises an eccentric wheel and a supporting plate, the eccentric wheel is connected with the supporting plate, the PH sensor, the pressure sensor and the temperature sensor are installed on the supporting plate, and the underwater motor set is connected with the eccentric wheel through a coupler and drives the eccentric wheel to rotate to drive the supporting plate to perform eccentric motion.
6. The deep sea formation long-term multi-parameter monitoring device according to claim 3, wherein: the water storage pressure maintaining cylinder comprises an end cover and a cylinder body, the piston penetrates through the end cover to be arranged in the cylinder body, the end cover is connected with the cylinder body in a sealing mode, and the end portion of the cylinder body is communicated with one end of the long guide pipe through a connector.
7. The deep sea formation long-term multi-parameter monitoring device according to claim 1, characterized in that: the monitoring rod is a rigid rod.
8. The deep sea formation long-term multi-parameter monitoring device according to claim 7, wherein: the monitoring rod body is 300 centimeters long, and the outer diameter of the monitoring rod body is 76 mm.
9. The deep sea formation long-term multi-parameter monitoring device according to claim 1, characterized in that: the monitoring rod body is provided with threads at two ends respectively.
10. A device for long-term multiparameter monitoring of deep sea formations according to any one of claims 1 to 9, characterized in that: the underwater electronic group comprises a linear motor and a rotating motor, wherein an output shaft of the linear motor is connected with the rotating motor, and an output shaft of the rotating motor is connected with the eccentric support through a coupler.
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| CN115078691A (en) * | 2022-06-16 | 2022-09-20 | 浙江大学 | Geological monitoring method and system for hydrate in seabed stratum space |
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