CN210570921U - Gas-liquid interface measuring device of salt cavern gas storage - Google Patents
Gas-liquid interface measuring device of salt cavern gas storage Download PDFInfo
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- CN210570921U CN210570921U CN201921840592.2U CN201921840592U CN210570921U CN 210570921 U CN210570921 U CN 210570921U CN 201921840592 U CN201921840592 U CN 201921840592U CN 210570921 U CN210570921 U CN 210570921U
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Abstract
The utility model discloses a gas-liquid interface measuring device of salt cavern gas storage, include: the device comprises a central pipe, an umbrella-shaped buoy and a laser ranging module; the central pipe is vertically inserted into the salt cavern gas storage and is used for discharging the brine; the umbrella-shaped buoy is arranged on the central pipe and is in a naturally drooping state when not contacting the brine liquid surface; when the umbrella-shaped buoy contacts the brine liquid level, the umbrella-shaped buoy naturally opens and floats on the brine liquid level; the laser ranging module is arranged on the central tube and used for transmitting laser to the umbrella-shaped buoy and receiving laser signals reflected from the umbrella-shaped buoy, so that the distance from the laser ranging module to the umbrella-shaped buoy is determined through the transmitted and received laser signals, and the depth of the gas-liquid interface is determined. The utility model discloses can realize real-time continuous measurement to the gas-liquid interface degree of depth.
Description
Technical Field
The utility model relates to a salt cavern gas storage technical field, more specifically relates to a gas-liquid interface measuring device of salt cavern gas storage.
Background
The salt cavern gas storage is built by injecting fresh water to store salt mine as a dissolving cavity, and the process is as follows: the pipelines such as a central pipe, a middle pipe, a sleeve and the like are driven downwards through a drilling well; dissolving by injecting fresh water, discharging brine by a drain pipe, and injecting an isolating liquid from a gap between a water injection pipe and a sleeve to avoid dissolving the top; and continuously adjusting parameters according to technical parameters such as brine salinity and the like during the period, and controlling the geometric shape and the volume of the underground cavity to finally obtain the gas storage according with the design requirement. During the construction and use process, the gas-liquid interface height must be controlled and adjusted to control the shape of the top plate of the cavity, and if the control is not proper, the top of the salt cavern can be dissolved, the geometric shape of the salt cavern is damaged, and the pressure holding capacity of the salt cavern is weakened. Meanwhile, after the gas storage is built and put into use, strict sealing is required, and a permanent packer is used on a central pipe, so that the conventional wired measurement method which can be used in the building process cannot be used, and the underground environmental conditions are more severe, which make the conventional measurement method and device difficult to meet the requirements.
At present, the problems existing in the measurement process of the gas-liquid interface are as follows:
1) in Chinese patent CN201711050272.2, the method and device for measuring the depth of gas-liquid interface of salt cavern gas storage relate to a method and device for measuring the liquid level of salt cavern gas storage, which uses a sensor and a cable to realize real-time continuous and large-range monitoring of the gas-liquid depth interface, but the method is only suitable for measuring the distance of the gas-liquid interface in the environment without permanent packers during the construction period of the gas storage because the cable cannot pass through the permanent packers, and the method for measuring the distance based on the three-point method of the wireless communication device has large interference on signal transmission and large influence on the precision because the sensor is respectively in three underground special environments of gas, liquid and gas-liquid interfaces.
2) In the process of using after building, a pipeline such as a central pipe is installed by a method of continuously extending a section of pipeline with the length of 10m downwards into the pipeline, wherein a permanent sealing device is used for keeping the cavity airtight in the process of extending the pipeline downwards, so that the design of the laser distance measuring device has great limitation. When the volume of the device is designed to be small for downward transportation and passing through a permanent packing device, the laser emission of the device is interfered by convex parts such as screw threads and the like at the joint of the central tube, and the integrity of a light path and the accuracy of measurement are greatly influenced; when the volume of the pipeline is designed to be large, the pipeline is difficult to transport downwards along the pipeline and is difficult to install and use normally.
3) In the underground scheme using the laser ranging device, under the condition that a buoy is not used, laser is directly used for irradiating a gas-liquid interface, and the laser reflection condition of the gas-liquid interface is too complex due to the factors of fluctuation of the gas-liquid interface, unstable oil-water mixture concentration and the like; the buoy is used for measurement, and if the buoy is fed into the cavity along the water flow, the buoy is difficult to fix and is difficult to recover; if the buoy is fixed on the pipeline, the problem that the pipeline cannot pass through a permanent packer when being installed downwards exists.
4) In a general laser ranging scheme using phase method ranging, the phase method is to obtain a phase difference through inverse trigonometric function calculation after signal processing
The function characteristics of the measured distance and the inverse trigonometric function are obtained, so that the distance measurement can only keep higher precision in a certain distance, and cannot maintain better precision in the designed whole range.
SUMMERY OF THE UTILITY MODEL
To prior art's defect, the utility model discloses an in solving the construction process and the salt cavern gas storage after putting into service can not carry out the technical problem of accurate measurement to salt cavern gas-liquid interface degree of depth.
In order to achieve the above object, the present invention provides a gas-liquid interface measuring device for a salt cavern gas storage, wherein the salt cavern gas storage is located underground, is formed by injecting brine into the underground, and is emptied of space to store gas by discharging brine; the method comprises the following steps: the device comprises a central pipe, an umbrella-shaped buoy and a laser ranging module;
the central pipe is vertically inserted into the salt cavern gas storage and is used for discharging the brine;
the umbrella-shaped buoy is arranged on the central pipe and is in a naturally drooping state when not contacting the brine liquid surface; when the umbrella-shaped buoy contacts the brine liquid level, the umbrella-shaped buoy naturally opens and floats on the brine liquid level;
the laser ranging module is arranged on the central tube and used for transmitting laser to the umbrella-shaped buoy and receiving laser signals reflected from the umbrella-shaped buoy, so that the distance from the laser ranging module to the umbrella-shaped buoy is determined through the transmitted and received laser signals, and the depth of the gas-liquid interface is determined.
Specifically, the umbrella-shaped buoy is coated with a material with good reflection performance.
Optionally, the apparatus further comprises: and the permanent packer is arranged at the sealing position of the salt cavern gas storage and is used for sealing the salt cavern gas storage.
Optionally, the laser emitting and receiving unit in the laser ranging module can be in a closed state and an outward extending state; the laser ranging module is arranging in the in-process of center tube to salt cavern gas storage transportation, when passing through during the permanent packer, the laser ranging module is the closed condition, when getting into in the cavity of salt cavern gas storage, the laser ranging module is outside state of stretching out, in order to umbrella-type buoy transmission and receipt laser signal.
Optionally, the apparatus further comprises: a card slot;
the clamping grooves are arranged at the joints of all sections of pipelines of the central pipe and are used for limiting the upper position and the lower position of the umbrella-shaped buoy.
Optionally, the clamping grooves and the umbrella-shaped buoys are all multiple groups; the number of which is the same as the number of segments of pipe used for the installed base pipe.
Optionally, the number of the laser ranging modules is also multiple, the laser ranging modules are annularly arranged at the same height of the central pipe along the circumference, and each laser ranging module measures the distance between the laser ranging module and the corresponding umbrella-shaped buoy;
the wavelength of light waves used by each laser ranging module is different, and the chromatic light with different frequencies has different sensitivity degrees to different distances when the phase method is used for ranging, so that the sensitivity of ranging is improved by using a plurality of laser ranging modules to work cooperatively.
Optionally, the permanent packer comprises a buffer area formed by two valves, when the central pipe is conveyed downwards above the permanent packer, the upper valve is opened, the lower valve is kept in a closed state, the conveyed central pipe enters the buffer area, then the upper valve is closed, the lower valve is opened, and after the central pipe is conveyed away from the buffer area, the lower valve is closed, so that the salt cavern gas storage is sealed.
Optionally, the laser ranging module determines the distance H from the laser ranging module to the umbrella buoy by the phase difference between the transmitted and received laser signals:
wherein c is the propagation speed of the light wave in the air; λ is the wavelength of the laser signal; n is a positive integer and represents an integral multiple of the wavelength of the laser signal;
is the phase difference between the transmitted and received laser signals.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:
the utility model provides a gas-liquid interface measuring device of salt cavern gas storage, the utility model discloses use an umbrella-type buoy installed on the center tube, the better material of reflection laser performance is used towards one side of laser ranging device to the buoy, the center tube passes in the middle of the buoy, the buoy is the flagging form naturally when not contacting the liquid level simultaneously, it floats on the gas-liquid interface to rely on self buoyancy when contacting the liquid level, the buoy of general use can make it satisfy pipeline dimensional requirement and transport downwards smoothly and through permanent packer again when the problem that the position is difficult to fix in the pit is solved in this design.
The utility model provides a gas-liquid interface measuring device of salt cave gas storage, because gas-liquid interface can have great fluctuation for liquid mixture such as brine and oil and gas-liquid interface in the salt cave, this utility model has used the buoy of the plane of reflection that contains the better material of reflection laser performance to solve when general laser rangefinder directly surveyed the liquid level because great gas-liquid interface reflection error and the influence that brings leads to being difficult to the problem of obtaining accurate reading, has greatly reduced the error.
The utility model provides a gas-liquid interface measuring device of salt cavern gas storage, thereby this utility model's laser rangefinder has the closure through mechanical design and outwards stretches out two kinds of states, makes the device can satisfy bushing portion size restriction under the closure state and normally installs downward transportation on the pipeline and through permanent packer, can make the light path of laser emission simultaneously under the outwards stretching out state avoid the buoy of installation on the pipeline and the screw thread of pipe connection department protruding such as, makes device ability normal use and work.
The utility model provides a gas-liquid interface measuring device of salt cavern gas storage, this utility model uses the chromatic light simultaneous measurement of a plurality of laser range finder use multiple frequency, and every laser range finder uses the chromatic light of a frequency, because the light of different frequencies has different sensitivity to different distances when phase place method data processing, has consequently used a plurality of modules that have the chromatic light of different frequencies to promote the sensitivity of range finder to the various range finding distance circumstances betterly, has ensured the reliability of data.
Drawings
Fig. 1 is a flow chart of a method for measuring a gas-liquid interface depth of a salt cavern gas storage provided by the present invention;
fig. 2 is a schematic structural diagram of a device for measuring the depth of a gas-liquid interface of a salt cavern gas storage provided by the utility model;
fig. 3 is a laser distance measuring device of the method for measuring the depth of the gas-liquid interface of the salt cavern gas storage provided by the utility model, (a) is a schematic diagram of the transportation process, and (B) is a schematic diagram of the use process;
fig. 4 is a schematic diagram of the buoy and the laser path in contact with brine and not in contact with brine in the process of measuring the gas-liquid interface depth of the salt cavern gas storage provided by the utility model;
in all the figures, the same reference numerals are used to denote the same elements or structures, wherein 1, laser ranging module; 2. a float; 3. a slot for restraining the float; 4. an external host; 5. a stored gas; 6. gas-liquid surface; 7. brine; 8. a salt cavern gas storage; 9. an intermediate pipe; 10. the earth surface; 11. a gas injection and production port; 12. a brine injection and production port; 13. a wireless transmission module ground receiving device; 14. a permanent packer; 15. a central tube; 16. an underground wireless transmission module; 17. a laser emitting device and a laser receiving device in the laser ranging module; 18. and (4) laser.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
The utility model discloses the main technical problem who solves provides a gas-liquid interface measuring device of salt cavern gas storage, has solved prior art and has been difficult to carry out real-time continuous measurement's technical problem to the liquid level degree of depth at gas storage construction and use.
In order to solve the technical problem, the utility model discloses a technical scheme be: the gas-liquid interface measuring scheme and device for salt cavern gas storage comprises:
the device consists of a laser emitting device, a laser receiving device and a buoy and is used for measuring the liquid level distance of the salt cavern gas storage;
the laser ranging device formed by combining the laser emitting device and the laser receiving device is arranged on a central pipe of the gas storage;
an umbrella-shaped buoy for measuring the liquid level distance is arranged on the central pipe and below the distance measuring device and used for reflecting laser to measure the distance;
further, put umbrella-type slidable buoy on the center tube, specifically include:
fixing the umbrella-shaped buoy on a central pipe, and arranging circular bulges at two ends of each section of pipeline so that the umbrella-shaped buoy can only slide along the corresponding section of central pipe;
the buoy floats on the gas-liquid surface based on the buoyancy of the buoy;
the surface of the buoy is made of a material with better laser reflection performance.
Further, affiliated laser rangefinder places on the center tube, specifically includes:
the distance measuring device comprises a laser emitting device, a receiving device and a communication device;
the distance measuring device is in a closed state and is in a cuboid shape when being transported downwards in the central pipe and the middle pipe;
after entering the cavity, the distance measuring device is in an open state, namely the laser emitting device and the receiving device extend outwards;
when the central tube is in an open state, the transmitting device, the receiving device and the central tube are in a parallel relation;
furthermore, the number of the used laser ranging devices is n, n colored lights with different frequencies are respectively generated and are uniformly distributed on the same height of the central tube to cooperatively work;
n is typically 3-5, which is related to the particular environment and the required accuracy requirements for the measurement.
The laser ranging device measures distance by using a phase method;
after the measurement task is finished, the laser ranging device sends signals to a ground receiving device by using a wireless transmission module which is connected with the laser ranging device and the central tube, and then the ground device transmits the signals to a host.
The utility model has the advantages that: the utility model discloses can real-time continuous measurement gas-liquid interface's degree of depth H to can reduce the error effectively. Wherein, the utility model discloses the degree of depth at measured gas-liquid interface refers to the distance between the gas-liquid interface distance laser rangefinder.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, an embodiment of the present invention includes:
a device for measuring the depth of a gas-liquid interface of a salt cavern gas storage solves the technical problem that the depth of the gas-liquid interface of the salt cavern cannot be accurately measured in the construction process and the salt cavern gas storage after being put into use in the prior art.
In order to solve the problems, the general idea is as follows:
now the umbrella buoy is mounted on the central tube; and then conveying the laser ranging device to a preset position in the cavity, opening the device, measuring the distance H between the device and the umbrella-shaped buoy which is opened under the action of the liquid level in real time, and transmitting a signal to an external receiving device through a communication device.
In order to better explain the technical content, the technical solutions will be described in more detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, the utility model provides a method for measuring the depth of gas-liquid interface of salt cavern gas storage, including:
step S1: mounting the buoy on a central pipe, and transporting downwards to finish mounting;
this step is explained:
installing the umbrella buoy 2 on the pipeline of the central pipe 15;
referring to fig. 4, the naturally drooping design of the umbrella buoy 2 when not in contact with the liquid surface allows it to be transported between the central pipe 15 and the intermediate pipe 9, while it also passes through the permanent packer 14, thus enabling a down-flow installation;
when the buoy 2 is not contacted with the liquid surface, the buoy is in a natural sagging state;
when the buoy 2 contacts the gas-liquid surface, it floats on the surface of the liquid due to buoyancy.
Step S2: mounting a laser ranging module on a central pipe and conveying the laser ranging module to a preset position at the top of the cavity;
referring to the structure of the laser ranging device 1 in fig. 3 (a), the laser ranging device 1 is in a closed state between the middle pipe 9 and the central pipe 15, and is shaped like a cuboid, so that the laser ranging device can enter the inside of the cavity through a permanent packer;
referring to fig. 3 (B), after entering the chamber, the distance measuring device 1 is opened, the laser generator and the receiver 17 are kept parallel to the central tube 15 at a certain distance, and the influence of the protrusion at the joint of the central tube 15 and the buoy 2 which is not in contact with the liquid level and is in a natural sagging state is avoided. Wherein a diagram a shows a state in which the laser ranging module 1 is in a state in which the casing portion is being carried downward; fig. 1 (B) shows a state where the laser ranging module 1 enters the cavity to operate.
Step S3: the external signal sends a measurement instruction, and the distance measurement module carries out distance measurement;
this step is explained:
when the liquid level measuring device starts measuring, the five measuring devices can work cooperatively to emit five colored lights with different frequencies, and the accuracy of different distances is different when the five lights are processed by a phase difference method, so that the accuracy can be still guaranteed when the liquid level is changed in a large range.
Step S4: sending the distance H measured by the distance measuring module to a ground host through a communication device;
this step is explained:
after the data is measured in the downhole portion, a varying current is generated in the wireless communication device 16, and a varying current is generated in the surface receiving device 13 through the ground, which is a good conductor. The ground host 4 realizes a communication function by measuring the voltage at both ends of the receiving device.
It should be noted here that the distance between the laser ranging device and the ground is known, and the measured distance H is used as the basis for determining the depth of the gas-liquid interface in the whole ranging process.
Referring to FIG. 2, the permanent packer 14 is further illustrated:
the permanent packer is installed at the position shown in the figure after the construction work of the salt cavern is completed, and is used for sealing the salt cavern;
the measuring scheme and the device thereof of the utility model can work normally no matter whether a permanent packer 14 exists or not;
the permanent packer 14 is a buffer area composed of two valves, when the object is conveyed downwards, the upper valve opens the lower valve to keep the sealing state, the transported object enters the buffer area, then the upper valve is closed, the lower valve is opened, and the lower valve is closed after the object is transported out of the buffer area;
referring to fig. 4, the laser ranging device is further described:
a laser transmitter and receiver section 17 which transmits laser 18 after receiving a measurement instruction;
the laser is reflected upwards when encountering the buoy in the open state and is received by the receiver;
ranging by detecting a phase difference between the transmitted signal and the received signal;
it should be noted here that the principle of the phase difference method is as follows:
Namely, it is
In the formula: h is the distance to be measured between the laser emission point and the laser reflection point; c is the propagation speed of the light wave in the air; λ is the wavelength of the modulation signal; f is the frequency of the modulation signal; n is a positive integer and represents an integral multiple of the wavelength of the modulation signal;
a phase difference generated for the modulated signal passing through the H distance;
a phase difference of less than one period.
Here, when the phase method is used, the frequency must be appropriately modulated so that N is equal to 0 according to the range of variation of the distance to be actually measured.
It should be noted here that, as can be seen in fig. 3, the laser transmitter and the receiving device 4 are spaced from the central tube by a certain distance, so as to avoid the light path being affected by the float in a sagging state;
it should be noted here that five laser emitters work together to emit five different frequencies of colored light, so that there are different degrees of measurement sensitivity for liquid levels at different depths.
It should be noted that, in the phase method mentioned above, the obtained waveform is processed to obtain
At first, the original waveform is processed
Is mathematically processed to obtain
While the function cosx has different error sensitivities for x at different phases when solved using an inverse trigonometric function. Therefore, the light with various frequencies is used for measurement, so that the data error can be ensured not to be overlarge at different distances.
The optical paths have been given in fig. 2 and 4 with dashed lines.
Referring to fig. 2, through the utility model discloses the step that the device that the example provided carries out measurement to the gas-liquid interface degree of depth is as follows:
1. installing an instrument on the ground: the connection between the receiving device 13 and the host 4 is completed on the ground, the buoy is installed on the pipeline, the laser ranging device is installed on the pipeline, preliminary testing can be carried out, and whether the host can normally acquire signals or not is observed.
2. And (3) logging in an instrument: and (3) starting to run the pipeline with the buoy installed into the well for installation, sequentially passing through the permanent packer (if the pipeline is in the construction process, the step is not needed), and then running the pipeline with the ranging module installed into the well.
3. And (3) data recording: and recording the specific position of the pipeline where the laser ranging module 1 is located, and recording the distance between the laser ranging module and the ground.
4. Starting distance measurement: the instrument is started, the host machine 4 issues a distance measuring instruction, the laser distance measuring device 1 emits laser and receives the laser reflected by the buoy, the distance H is obtained through a phase method, and signals are transmitted to the host machine 4 through the communication device.
5. And (4) finishing detection: when the detection is finished at this stage, the host 4 is closed after the required distance measuring task is finished, and the laser distance measuring device is recovered upwards so as to carry out the next measurement.
The utility model provides a gas-liquid interface measuring device of salt cavern gas storage can be used for salt cavern gas storage to build period and live time simultaneously, and the usage is extensive. The utility model discloses a solved and no longer allowed measuring device to use wired device's problem behind the permanent packer. Meanwhile, the device can be recycled, and the economic benefit is improved. Because the salt cavern is in a lightless environment, the laser ranging module is used without external light source interference, and meanwhile, the buoy with good reflection performance is used, so that the problem of reflection of the liquid level of the light path is avoided, and the accuracy and the reliability of measured data are guaranteed. And simultaneously, multiple color lights are used for simultaneous measurement, so that the reliability of data is ensured.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A gas-liquid interface measuring device of a salt cavern gas storage is characterized in that the salt cavern gas storage is located underground, is formed by injecting brine into the underground, and is emptied of space by discharging the brine to store gas; it is characterized by comprising: the device comprises a central pipe, an umbrella-shaped buoy and a laser ranging module;
the central pipe is vertically inserted into the salt cavern gas storage and is used for discharging the brine;
the umbrella-shaped buoy is arranged on the central pipe and is in a naturally drooping state when not contacting the brine liquid surface; when the umbrella-shaped buoy contacts the brine liquid level, the umbrella-shaped buoy naturally opens and floats on the brine liquid level;
the laser ranging module is arranged on the central tube and used for transmitting laser to the umbrella-shaped buoy and receiving laser signals reflected from the umbrella-shaped buoy, so that the distance from the laser ranging module to the umbrella-shaped buoy is determined through the transmitted and received laser signals, and the depth of the gas-liquid interface is determined.
2. A gas-liquid interface measuring device according to claim 1, further comprising: and the permanent packer is arranged at the sealing position of the salt cavern gas storage and is used for sealing the salt cavern gas storage.
3. The gas-liquid interface measuring device according to claim 2, wherein the laser emitting and receiving unit in the laser ranging module can be in two states of being closed and extending outwards; the laser ranging module is arranging in the in-process of center tube to salt cavern gas storage transportation, when passing through during the permanent packer, the laser ranging module is the closed condition, when getting into in the cavity of salt cavern gas storage, the laser ranging module is outside state of stretching out, in order to umbrella-type buoy transmission and receipt laser signal.
4. A gas-liquid interface measuring device according to claim 1, further comprising: a card slot;
the clamping grooves are arranged at the joints of all sections of pipelines of the central pipe and are used for limiting the upper position and the lower position of the umbrella-shaped buoy.
5. The gas-liquid interface measuring device according to claim 4, wherein the plurality of sets of the card slots and the umbrella-shaped buoys are provided; the number of which is the same as the number of segments of pipe used for the installed base pipe.
6. The gas-liquid interface measuring device according to claim 1, wherein the laser ranging modules are arranged at the same height of the central pipe in a circular manner along the circumference, and each laser ranging module measures the distance between the laser ranging module and the corresponding umbrella-shaped buoy;
the wavelength of light waves used by each laser ranging module is different, and the chromatic light with different frequencies has different sensitivity degrees to different distances when the phase method is used for ranging, so that the sensitivity of ranging is improved by using a plurality of laser ranging modules to work cooperatively.
7. The gas-liquid interface measuring device of claim 2, wherein the permanent packer comprises a buffer area formed by two valves, when the central pipe is conveyed downwards, the upper valve is opened, the lower valve is kept in a closed state, the conveyed central pipe enters the buffer area, then the upper valve is closed, the lower valve is opened, and after the central pipe is conveyed out of the buffer area, the lower valve is closed, so that the salt cavern gas storage is sealed.
8. The gas-liquid interface measuring device according to any one of claims 1 to 7, wherein the laser ranging module determines a distance H of the laser ranging module from the umbrella-shaped buoy by a phase difference between transmitted and received laser signals:
wherein c is the propagation speed of the light wave in the air; λ is the wavelength of the laser signal; n is a positive integer and represents a laser signal waveAn integer multiple of length;
is the phase difference between the transmitted and received laser signals.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237532A (en) * | 2021-04-29 | 2021-08-10 | 中国地质大学（武汉） | Salt cavern gas storage liquid level measurement system and method based on sloping print pavilion vector detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237532A (en) * | 2021-04-29 | 2021-08-10 | 中国地质大学（武汉） | Salt cavern gas storage liquid level measurement system and method based on sloping print pavilion vector detection |
| CN113237532B (en) * | 2021-04-29 | 2022-03-22 | 中国地质大学（武汉） | Salt cavern gas storage liquid level measurement system and method based on sloping print pavilion vector detection |
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