CN109900388B - High-precision water skin temperature measuring device - Google Patents
High-precision water skin temperature measuring device Download PDFInfo
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- CN109900388B CN109900388B CN201910133953.8A CN201910133953A CN109900388B CN 109900388 B CN109900388 B CN 109900388B CN 201910133953 A CN201910133953 A CN 201910133953A CN 109900388 B CN109900388 B CN 109900388B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 55
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- 239000010959 steel Substances 0.000 claims abstract description 86
- 238000009434 installation Methods 0.000 claims abstract description 22
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- 239000000523 sample Substances 0.000 claims description 20
- 238000004806 packaging method and process Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 8
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- 235000000396 iron Nutrition 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 3
- 239000006261 foam material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229920002396 Polyurea Polymers 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000009529 body temperature measurement Methods 0.000 description 7
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- 235000017491 Bambusa tulda Nutrition 0.000 description 2
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- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
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- 229920001971 elastomer Polymers 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
The invention belongs to the field of marine environment detection, and relates to a high-precision water skin temperature measuring device. The device comprises a high-precision temperature array sensor, a temperature collector, a battery, a wireless data transmission module, a main floating body assembling steel plate and a floating body connecting and fixing device; the temperature collector and the battery package are arranged in the main floating body; the main floating body assembly steel plate comprises an upper assembly steel plate and a lower assembly steel plate, and a cylindrical installation cylinder is fixedly arranged between the upper assembly steel plate and the lower assembly steel plate; the float connecting and fixing device comprises a circular tube which is vertically arranged, and the cylindrical mounting cylinder is sleeved on the circular tube and can slide up and down relative to the circular tube. The high-precision water skin temperature measuring device provided by the invention can freely move along with waves and tidal range to measure the temperature of 50cm below 50cm on the surface layer of the water body, namely within the range of 100cm, and can be randomly fixed on a structure fixed on the sea or the shore, and has stronger structural adaptability.
Description
Technical Field
The invention belongs to the technical field of marine environment detection, and particularly relates to a high-precision water skin temperature measuring device.
Background
At present, the temperature measurement of the surface layer of the water body is carried out by depending on a temperature sensor additionally arranged on a marine data buoy or by an infrared remote sensing mode, and the temperature sensor additionally arranged on the marine data buoy can only measure the temperature of one point time although not being a contact sensor, so that the use is less, and the data with higher quality cannot be obtained in certain specific occasions (for example, certain observation requirements need to observe multi-position water temperature data of 30cm above and below the surface of the water body). The infrared remote sensing temperature measuring mode mainly utilizes a non-contact infrared sensor to observe the sea water temperature in a large range, but has lower observation precision and low manufacturing cost.
Disclosure of Invention
Aiming at the technical problems, the invention provides a high-precision water skin temperature measuring device which can freely move along with waves and tide differences, and can realize 24-hour all-weather temperature measurement in the range of 50cm above and below the surface layer of the water body; the device can be fixed on a structure on the sea or on the shore, such as a pile leg of an offshore oil platform or a shallow sea tower, has strong structural adaptability, and meets the measurement requirement under the condition of adapting to waves and tidal range.
The invention is realized by the following technical scheme:
A high-precision water skin temperature measuring device comprises a high-precision temperature array sensor, a temperature collector, a battery, a wireless data transmission module, a main floating body prepared from foam materials, a main floating body assembling steel plate and a floating body connecting and fixing device;
A groove for accommodating the high-precision temperature array sensor is arranged in the vertical direction at the edge of the main floating body; the temperature collector and the battery package are arranged in the main floating body;
A cylindrical through hole is formed in the vertical direction of the main floating body in a penetrating manner; the main floating body assembly steel plate comprises an upper assembly steel plate and a lower assembly steel plate which are respectively attached to the upper part and the lower part of the main floating body, a cylindrical installation cylinder is fixedly arranged between the upper assembly steel plate and the lower assembly steel plate, and the cylindrical installation cylinder is attached to a cylindrical through hole of the main floating body;
the float connecting and fixing device comprises a circular tube which is vertically arranged, and the cylindrical mounting cylinder is sleeved on the circular tube and can slide up and down relative to the circular tube; the float connecting and fixing device further comprises limiting plates arranged at the upper end and the lower end of the round tube and used for limiting the moving distance of the cylindrical installation sleeve, and connecting parts used for connecting the whole water skin temperature measuring device with a marine or shore fixed structure.
Further, the battery is used for supplying power to the high-precision temperature array sensor, the temperature collector and the wireless data transmission module;
The temperature collector is used for collecting and processing output signals of the high-precision temperature array sensor, temperature data processed by the temperature collector are transmitted to the wireless data transmission module, and the wireless data transmission module transmits the temperature data to the data receiving terminal.
Further, the high-precision temperature array sensor adopts contact type high-precision temperature measuring probes, the total number of the probes is more than 48 (in different embodiments, the number of the probes can be increased according to the observation requirement), the measurement precision of each temperature measuring probe is 0.02 ℃, the temperature measuring probes are arranged along the vertical direction, the distance between two adjacent temperature probes is 1.8cm-2.2cm (the specific distance range can adjust the probe distance according to the requirement), and the total length of the high-precision temperature array sensor is at least 100cm;
when the measurement is carried out, the center position of the high-precision temperature array sensor is positioned on the surface of the water body, so that the temperature in the air with the upward direction of the surface of the water body is measured, and the underwater temperature with the downward direction of the surface of the water body is measured at least 50 cm.
Further, a battery mounting cylinder and a temperature collector mounting cylinder are arranged in the main floating body;
The temperature collector mounting cylinder is used for packaging the temperature collector;
the battery mounting cylinder is used for packaging the battery, a power line is led out from the battery mounting cylinder for packaging the battery, and the power line is connected with the high-precision temperature array sensor, the temperature collector and the wireless data transmission module to realize power supply.
Further, the main floating body is prepared by polyurea acid foam; the main floating bodies comprise a first main floating body and a second main floating body which are all semi-cylindrical; the first main floating body and the second main floating body are in butt joint to form a cylindrical main floating body; to ensure that the floating body has enough reserve buoyancy and the working requirement of the high-precision temperature array sensor, the diameter of the cylindrical main floating body is between 650mm and 700mm, and the height is between 380mm and 420 mm.
Further, a temperature collector mounting cylinder on the main floating body and a groove for accommodating the high-precision temperature array sensor are arranged on the first main floating body, and a battery mounting cylinder is arranged on the second main floating body;
the butt joint parts of the first main floating body and the second main floating body comprise semicircular grooves arranged in the vertical direction, and cylindrical through holes are formed in the vertical direction of the main floating bodies after the first main floating body is in butt joint with the second main floating body.
Further, the upper assembly steel plate attached to the upper portion of the main floating body comprises a first upper assembly steel plate and a second upper assembly steel plate which are respectively matched with the first main floating body and the second main floating body in shape, and the first upper assembly steel plate and the second upper assembly steel plate are connected through fixed angle irons;
The lower assembly steel plate which is attached to the lower part of the main floating body comprises a first lower assembly steel plate and a second lower assembly steel plate which are respectively matched with the shapes of the first main floating body and the second main floating body, and the first lower assembly steel plate and the second lower assembly steel plate are connected through fixed angle irons;
and the first upper assembly steel plate and the first lower assembly steel plate are provided with high-precision temperature array sensor mounting support rods for supporting and fixing the high-precision temperature array sensors.
Further, the main floating body assembly steel plate is fixedly connected with the main floating body through a string rod; the string rod sequentially penetrates through the upper assembly steel plate, the main floating body and the lower assembly steel plate.
Further, the fixed structure on the sea or on the shore comprises a pile leg of an offshore oil platform or a shallow sea tower.
The beneficial technical effects of the invention are as follows:
(1) The high-precision water skin temperature measuring device provided by the invention adopts the high-precision temperature array sensor, the high-precision temperature array sensor comprises a large number of temperature measuring probes, the measuring precision of each temperature measuring probe is 0.02 ℃, the measurement of the multi-point water skin temperature is realized more simply and accurately, and the measuring precision is improved.
(2) The structure of the high-precision water skin temperature measuring device provided by the invention can freely move along with waves and tide, when the measuring is carried out, the center position of the high-precision temperature array sensor is positioned on the surface of the water body, the air temperature of at least 50cm upwards on the surface of the water body can be measured, and meanwhile, the underwater temperature of at least 50cm downwards on the surface of the water body can be measured, so that the temperature measurement (including the temperature in the air and the temperature under the water) in the range of 50cm above and below the surface of the water body can be realized in 24 hours in all weather.
(3) The high-precision water skin temperature measuring device provided by the invention has smaller size and volume, thus being capable of being randomly fixed on a structure fixed on the sea or on the shore, such as a pile leg of an offshore oil platform or a shallow sea tower, having stronger structural adaptability and meeting the measuring requirement under the condition of adapting to waves and tidal range.
(4) The high-precision water skin temperature measuring device provided by the invention has the advantages of simple structure, easiness in disassembly and assembly and certain strength.
Drawings
FIG. 1 is a schematic diagram of a high-precision water skin temperature measuring device in an embodiment of the invention;
FIG. 2 is a schematic diagram of a first main floating body structure according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a second main floating body structure according to an embodiment of the present invention;
FIG. 4 is a schematic view of a main floating body assembly steel plate structure according to an embodiment of the present invention;
FIG. 5 is a schematic view of a float installation structure for measuring the water surface temperature in an embodiment of the invention;
Reference numerals: 1. a high-precision temperature array sensor; 2. a temperature collector; 3. a battery; 4. a wireless data transmission module; 5. a main floating body; 5-1, a first main floating body; 5-2, a second main floating body; 6. the main floating body is provided with a steel plate; 6-1, assembling a steel plate; 6-2, lower assembling steel plates; 6-3, a cylindrical mounting cylinder; 6-4, fixing angle iron; 6-5, mounting a supporting rod of the temperature sensor; 6-6, stringing; 7. the floater is connected with the fixing device; 7-1, round tubes; 7-2, limiting plates; 7-3, connecting part; 8. a fixed structure on the sea or on the shore.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
On the contrary, the invention is intended to cover any alternatives, modifications, equivalents, and variations as may be included within the spirit and scope of the invention as defined by the appended claims. Further, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. The present invention will be fully understood by those skilled in the art without the details described herein.
Aiming at the prior art, the temperature measurement of the surface layer of the water body is carried out by adopting a mode of depending on ocean data buoys and infrared remote sensing temperature measurement, the temperature sensor additionally arranged on the ocean data buoys can only measure the water temperature of one point, and in certain specific occasions (for example, certain observation requirements need to observe multi-position water temperature data of 30cm above and below the surface of the water body), higher-quality data can not be obtained. The infrared remote sensing temperature measuring mode mainly utilizes a non-contact infrared sensor to observe the sea water temperature in a large range, but has lower observation precision and simultaneously has the technical problem of low manufacturing cost.
The invention provides an embodiment of a high-precision water skin temperature measuring device, as shown in figures 1-4, comprising: the device comprises a high-precision temperature array sensor 1, a temperature collector 2, a battery 3, a wireless data transmission module 4, a main floating body 5 prepared from foam materials, a main floating body assembling steel plate 6 and a floating body connecting and fixing device 7;
a groove for accommodating the high-precision temperature array sensor is arranged at the edge of the main floating body 5; the temperature collector and the battery package are arranged in the main floating body;
A cylindrical through hole is formed in the vertical direction of the main floating body 5 in a penetrating manner; the main floating body assembly steel plate 6 comprises an upper assembly steel plate 6-1 and a lower assembly steel plate 6-2 which are respectively attached to the upper part and the lower part of the main floating body, a cylindrical installation cylinder 6-3 is fixedly arranged between the upper assembly steel plate and the lower assembly steel plate, and the cylindrical installation cylinder is attached to the cylindrical through hole;
The float connecting and fixing device comprises a circular tube 7-1 which is vertically arranged, and the cylindrical mounting cylinder is sleeved on the circular tube and can slide up and down relative to the circular tube; the float connecting and fixing device also comprises limiting plates 7-2 which are arranged at the upper end and the lower end of the circular tube and used for limiting the moving distance of the cylindrical installation sleeve, and a connecting part 7-3 which is used for connecting the whole water skin temperature measuring device with an offshore or shore fixed structure 8.
Preferably, in order to enable the whole measuring float to move up and down along the circular tube more smoothly and stably, the number of the cylindrical mounting sleeves and the number of the circular tube are two. And preferably, the cylindrical installation sleeve is made of stainless steel, a steel pad with a size larger than that of the cylindrical installation sleeve is sleeved on the upper part of the cylindrical installation sleeve, and a rubber pad can be placed on the upper part of the steel pad to play a role in buffering.
In this embodiment, the battery is configured to supply power to the high-precision temperature array sensor, the temperature collector, and the wireless data transmission module;
The temperature collector is used for collecting and processing output signals of the high-precision temperature array sensor, temperature data processed by the temperature collector are transmitted to the wireless data transmission module, and the wireless data transmission module transmits the temperature data to the data receiving terminal.
The high-precision temperature array sensor adopts the structure that the total number of contact type high-precision temperature measuring probes is more than 48 (the number of probes can be increased according to the observation requirement), the measurement precision of each temperature measuring probe is 0.02 ℃, the temperature measuring probes are arranged along the vertical direction, two adjacent temperature probes are spaced by 2cm (the probe spacing can be adjusted according to the requirement, the range is 1.8cm-2.2 cm), and the total length of the high-precision temperature array sensor is at least 100cm.
When the measurement is carried out, the center position of the high-precision temperature array sensor is positioned on the surface of the water body, so that the temperature in the air with the upward direction of the surface of the water body is measured, and the underwater temperature with the downward direction of the surface of the water body is measured at least 50 cm.
In the embodiment, a battery mounting cylinder and a temperature collector mounting cylinder are arranged in the main floating body; the temperature collector mounting cylinder is used for packaging the temperature collector;
the battery mounting cylinder is used for packaging the battery, a power line is led out from the battery mounting cylinder for packaging the battery, and the power line is connected with the high-precision temperature array sensor, the temperature collector and the wireless data transmission module to realize power supply.
In this example, the primary float is made from a polyureaacid foam; the main floating bodies comprise a first main floating body 5-1 and a second main floating body 5-1 which are all semi-cylindrical; the first main floating body 5-1 and the second main floating body 5-2 are in butt joint to form a cylindrical main floating body 5; in the present embodiment, the cylindrical main float 5 has a diameter ranging specifically from: the height range of 650mm is: 400mm. The diameter and the height of the main floating body are selected, so that the floating body can have enough reserve buoyancy and the working requirement of the high-precision temperature array sensor can be met.
In this embodiment, the temperature collector mounting cylinder on the main floating body and the groove for accommodating the high-precision temperature array sensor are both disposed on the first main floating body, and the battery mounting cylinder is disposed on the second main floating body; the joint of the first main floating body and the second main floating body comprises semicircular grooves arranged in the vertical direction, and a cylindrical through hole is formed in the vertical direction of the main floating body after the first main floating body and the second main floating body are in butt joint;
preferably, two battery mounting barrels are arranged on the second main floating body, and each battery mounting barrel is internally provided with a battery.
In this embodiment, the upper assembly steel plate attached to the upper portion of the main floating body includes a first upper assembly steel plate and a second upper assembly steel plate respectively corresponding to the shapes of the first main floating body and the second main floating body, and the first upper assembly steel plate and the second upper assembly steel plate are connected through a fixed angle iron 6-4;
The lower assembly steel plate which is attached to the lower part of the main floating body comprises a first lower assembly steel plate and a second lower assembly steel plate which are respectively matched with the shapes of the first main floating body and the second main floating body, and the first lower assembly steel plate and the second lower assembly steel plate are connected through fixed angle irons 6-4;
A temperature sensor mounting support rod 6-5 is arranged on the first upper assembly steel plate and the first lower assembly steel plate and is used for supporting and fixing the high-precision temperature array sensor;
Preferably, openings are formed in the first upper assembly steel plate and the first lower assembly steel plate so as to facilitate the installation of the temperature collector and the high-precision temperature array sensor, and the positions of the openings correspond to the positions of the temperature collector installation cylinder and the groove for accommodating the high-precision temperature array sensor;
holes are formed in the second upper assembly steel plate and the second lower assembly steel plate so as to facilitate installation of the battery, and the positions of the holes correspond to the positions of the battery installation cylinders.
In the embodiment, the main floating body assembly steel plate and the main floating body are fixedly connected through a string rod 6-6; the string rod sequentially penetrates through the upper assembly steel plate, the main floating body and the lower assembly steel plate.
Preferably, one end of the string rod, which is positioned on the upper part of the upper assembly steel plate, is hexagonal, the other end of the string rod is a screw rod, and when the string rod is fixed, one end of the screw rod is fixed on the upper assembly plate through the tail end of the hexagon, and the other end of the screw rod is fixed and pressed through a nut. Preferably, the number of stems is a plurality, such as 8, evenly distributed along the edge area of the measuring float.
In this embodiment, the offshore or onshore fixed structure 8 comprises a pile leg of an offshore oil platform or a shallow sea tower.
When the high-precision water skin temperature measuring device provided by the embodiment of the invention is installed, as shown in fig. 5, a first main floating body and a second main floating body are butted at sea, then an upper assembly steel plate and a lower assembly steel plate are respectively and adjacently arranged at the upper part and the lower part of the main floating body, a cylindrical installation cylinder is fixedly arranged between the upper assembly steel plate and the lower assembly steel plate, and the cylindrical installation cylinder is adjacently arranged with the cylindrical through hole; then run through the string pole in proper order the last assembly steel sheet the main body with the lower assembly steel sheet is fixed through the nut compresses tightly, runs through cylindric installation section of thick bamboo with the pipe that the vertical setting of float connection fixing device, restriction through limiting plate cylindric installation section of thick bamboo cover's travel distance to connect whole water skin temperature measuring device and marine or fixed knot structure on bank through connecting portion, accomplish the assembly of temperature measurement float, and then the temperature measurement float can carry out single degree of freedom along the pipe and heave and remove, carries out the measurement of water surface layer temperature. And finally, transmitting all data of the water surface temperature acquired by the floater to a data receiving terminal through a wireless data transmission module arranged on the upper part of the data. Preferably, the vertical circular tube setting position of the connecting and fixing device is fixed after calculation according to the tide difference, the sea level is positioned in the middle of the circular tube during flat tide, and then the temperature measuring floater can move along the circular tube floater along with the wave. The float for measuring the surface temperature of the water in the embodiment is designed to be of a two-half structure, and can be conveniently installed on the sea.
The high-precision water skin temperature measuring device provided by the embodiment of the invention can be used for simply and accurately measuring the water surface temperature, improves the measuring precision (different 50cm points on the upper and lower surfaces of the water can be measured), has strong structural adaptability, can be connected with different water structures, and meets the measuring requirement under the condition of adapting to waves and tidal range.
Claims (5)
1. The high-precision water skin temperature measuring device is characterized by comprising a high-precision temperature array sensor, a temperature collector, a battery, a wireless data transmission module, a main floating body prepared from foam materials, a main floating body assembling steel plate and a floating body connecting and fixing device;
A groove for accommodating the high-precision temperature array sensor is arranged in the vertical direction at the edge of the main floating body; the temperature collector and the battery package are arranged in the main floating body;
A cylindrical through hole is formed in the vertical direction of the main floating body in a penetrating manner; the main floating body assembly steel plate comprises an upper assembly steel plate and a lower assembly steel plate which are respectively attached to the upper part and the lower part of the main floating body, a cylindrical installation cylinder is fixedly arranged between the upper assembly steel plate and the lower assembly steel plate, and the cylindrical installation cylinder is attached to a cylindrical through hole of the main floating body;
The float connecting and fixing device comprises a circular tube which is vertically arranged, and the cylindrical mounting cylinder is sleeved on the circular tube and can slide up and down relative to the circular tube; the float connecting and fixing device also comprises limiting plates which are arranged at the upper end and the lower end of the circular tube and used for limiting the moving distance of the cylindrical installation sleeve, and a connecting part which is used for connecting the whole water skin temperature measuring device with a fixed structure on the sea or on the bank;
a battery mounting cylinder and a temperature collector mounting cylinder are arranged in the main floating body;
The temperature collector mounting cylinder is used for packaging the temperature collector;
The battery mounting cylinder is used for packaging the battery, a power line is led out from the battery mounting cylinder for packaging the battery, and the power line is connected with the high-precision temperature array sensor, the temperature collector and the wireless data transmission module to realize power supply;
The main floating body is prepared from polyurea acid foam; the main floating bodies comprise a first main floating body and a second main floating body which are all semi-cylindrical; the first main floating body and the second main floating body are in butt joint to form a cylindrical main floating body; the diameter of the cylindrical main floating body is between 650mm and 700mm, and the height is between 380mm and 420 mm;
The temperature collector mounting cylinders on the main floating bodies and the grooves for accommodating the high-precision temperature array sensors are all arranged on the first main floating bodies, and the battery mounting cylinders are arranged on the second main floating bodies;
the joint of the first main floating body and the second main floating body comprises semicircular grooves arranged in the vertical direction, and a cylindrical through hole is formed in the vertical direction of the main floating body after the first main floating body and the second main floating body are in butt joint;
the upper assembly steel plate which is attached to the upper part of the main floating body comprises a first upper assembly steel plate and a second upper assembly steel plate which are respectively matched with the shapes of the first main floating body and the second main floating body, and the first upper assembly steel plate and the second upper assembly steel plate are connected through fixed angle irons;
The lower assembly steel plate which is attached to the lower part of the main floating body comprises a first lower assembly steel plate and a second lower assembly steel plate which are respectively matched with the shapes of the first main floating body and the second main floating body, and the first lower assembly steel plate and the second lower assembly steel plate are connected through fixed angle irons;
and the first upper assembly steel plate and the first lower assembly steel plate are provided with high-precision temperature array sensor mounting support rods for supporting and fixing the high-precision temperature array sensors.
2. The high-precision water skin temperature measuring device according to claim 1, wherein the battery is used for supplying power to the high-precision temperature array sensor, the temperature collector and the wireless data transmission module;
The temperature collector is used for collecting and processing output signals of the high-precision temperature array sensor, temperature data processed by the temperature collector are transmitted to the wireless data transmission module, and the wireless data transmission module transmits the temperature data to the data receiving terminal.
3. The high-precision water skin temperature measuring device according to claim 1 or 2, wherein the high-precision temperature array sensor adopts contact type high-precision temperature measuring probes, the total number of the probes is more than 48, the measuring precision of each temperature measuring probe is 0.02 ℃, the temperature measuring probes are arranged along the vertical direction, two adjacent temperature probes are spaced by 1.8cm-2.2cm, and the total length of the high-precision temperature array sensor is at least 100cm;
when the measurement is carried out, the center position of the high-precision temperature array sensor is positioned on the surface of the water body, so that the temperature in the air with the upward direction of the surface of the water body is measured, and the underwater temperature with the downward direction of the surface of the water body is measured at least 50 cm.
4. The high-precision water skin temperature measuring device according to claim 1, wherein the main floating body assembly steel plate and the main floating body are fixedly connected through a string rod; the string rod sequentially penetrates through the upper assembly steel plate, the main floating body and the lower assembly steel plate.
5. The high-precision water skin temperature measuring device according to claim 1, wherein the offshore or onshore fixed structure comprises a pile leg of an offshore oil platform or a shallow sea tower.
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