CN114427889A - Dragging type warm salt depth probe capable of eliminating pressure oscillation phenomenon - Google Patents
Dragging type warm salt depth probe capable of eliminating pressure oscillation phenomenon Download PDFInfo
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- CN114427889A CN114427889A CN202210356926.9A CN202210356926A CN114427889A CN 114427889 A CN114427889 A CN 114427889A CN 202210356926 A CN202210356926 A CN 202210356926A CN 114427889 A CN114427889 A CN 114427889A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
- G01C13/008—Surveying specially adapted to open water, e.g. sea, lake, river or canal measuring depth of open water
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measuring Fluid Pressure (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention relates to the technical field of marine environment monitoring, and particularly discloses a towed warm salt depth probe capable of eliminating pressure oscillation phenomena, which comprises a counterweight head, a pressure-resistant cabin and a tail rod which are sequentially connected, wherein the front end in the pressure-resistant cabin is provided with a sensor mounting end cover, and the sensor mounting end cover is provided with a pressure sensor, a temperature sensor and a conductivity sensor; the inside hollow structure that is of counterweight head, pressure sensor, temperature sensor and conductivity sensor are located the inside cavity of counterweight head, evenly seted up income water hole, well hole and water conservancy diversion hole in proper order along the circumferencial direction on the casing of counterweight head from bottom to top, and the quantity in income water hole, well hole and water conservancy diversion hole is 6, and well hole and water conservancy diversion hole site have 30 contained angles on the circumferencial direction in the hole and well hole and water conservancy diversion hole in the middle of just being located same straight line. The probe disclosed by the invention can reduce the turbulence phenomenon in the counterweight head, eliminate the pressure oscillation phenomenon and the space difference of measured data and improve the measurement accuracy.
Description
Technical Field
The invention relates to the technical field of marine environment monitoring, in particular to a dragging type thermohaline depth probe capable of eliminating a pressure oscillation phenomenon.
Background
In marine hydrology, seawater temperature, salinity and depth are the three most basic parameters. The towed temperature and salt depth measuring probe is one instrument capable of measuring sea water temperature, salinity and depth parameters fast. The temperature of the seawater is measured by a temperature sensor, the salinity is measured by a conductivity sensor, and the depth is measured by a pressure sensor.
The existing dragging type temperature, salinity and depth probe measures the seawater pressure by using a pressure sensor, thereby calculating the seawater depth. When the pressure sensor is used for dynamically and rapidly measuring the seawater depth profile, a pressure oscillation phenomenon exists, which is specifically shown in the figure 1 that pressure data measured by the pressure sensor has sawtooth-shaped fluctuation, and the phenomenon can greatly influence the accuracy of the seawater depth data.
The current towed warm salt deep probe is provided with a steel sheath which is positioned at the front part of the probe, the inside of the steel sheath is hollow, and a counterweight lead block is arranged in the steel sheath, so that the integral gravity center of the probe is positioned at the lower part of the probe, the probe is kept in a vertical state in the falling process, and the probe cannot fall down or roll under the action of ocean current to cause measurement failure.
The pressure sensor is arranged on the connecting piece at the upper part of the steel sheath and is protected by the steel sheath. A water flow channel is reserved in the middle of the counterweight lead block in the steel sheath, and the channel enables external seawater to be communicated with the pressure sensor. When the probe falls in seawater, the water flow channel is filled with seawater, the seawater is contacted with the pressure sensor, and the pressure sensor measures the seawater pressure at the position.
The reason for causing the pressure oscillation phenomenon is because the inside sea water that is full of rivers passageway of probe steel sheath, the falling speed of probe can't be synchronous with the discharge velocity of sea water in this passageway, also be exactly because structural defect, make the sea water in the passageway discharge in time smoothly, will produce the torrent with pressure sensor's the place ahead in rivers passageway like this and pile up, the existence of this torrent will cause extra impact to pressure sensor, make the fluctuation of the data that pressure sensor measured appear suddenly high suddenly low, the sea water pressure of the degree of depth that can't the accurate reflection probe is located, thereby influence measured data's accuracy. In addition, this phenomenon is exacerbated by the direct impact of seawater through the flow channel as the probe is dropped.
In addition, the temperature sensor and the conductivity sensor of the current drag type warm salt deep probe are arranged on the head end cover at the front end of the steel sheath, and are not in the same plane with the pressure sensor, and a height difference exists between the temperature sensor and the conductivity sensor, so that data measured by the temperature sensor and the conductivity sensor are not in the same water layer with data measured by the pressure sensor at the same time, and space difference of the measured data is caused, and the acquired data cannot reflect the real situation.
In addition, the balance weight of the current dragging type warm salt depth probe uses a lead block, and the lead block can cause certain pollution to the ocean.
Disclosure of Invention
In order to solve the technical problems, the invention provides a dragging type warm salt depth probe capable of eliminating the pressure oscillation phenomenon, so as to achieve the purposes of eliminating the pressure oscillation phenomenon and the space difference of measurement data and improving the measurement accuracy.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a drag type warm salt depth probe capable of eliminating pressure oscillation phenomena comprises a counterweight head, a pressure-resistant cabin and a tail rod which are sequentially connected, wherein a sensor mounting end cover is mounted at the front end in the pressure-resistant cabin, and a pressure sensor, a temperature sensor and a conductivity sensor are mounted on the sensor mounting end cover; the inside hollow structure that is of counterweight head, pressure sensor, temperature sensor and conductivity sensor are located the inside cavity of counterweight head, income water hole, well hole and water conservancy diversion hole have evenly been seted up along the circumferencial direction in proper order on counterweight head's the casing from bottom to top, the quantity in income water hole, well hole and water conservancy diversion hole is 6, just well hole and water conservancy diversion hole site are on same straight line, it has 30 contained angles with well hole and water conservancy diversion hole on the circumferencial direction to go into the water hole.
In the above scheme, the water conservancy diversion hole is the inclined hole, just contained angle between the axis in water conservancy diversion hole and the axis of counter weight head is 33.75, can improve the speed that the interior seawater of counter weight head flows out, prevents that the torrent from piling up.
In the above scheme, the pressure sensor is located in the center of the sensor mounting end cover, and the temperature sensor and the conductivity sensor are distributed on two sides of the pressure sensor.
In the scheme, the foremost end of the counterweight head is of a platform structure and is used for generating certain resistance when the probe falls down, so that the effect of adjusting the falling speed of the probe is achieved.
In the scheme, the middle hole is a strip-shaped hole, and the cross-sectional area of the middle hole is larger than that of the water inlet hole and the diversion hole, so that the middle hole is used for fully exchanging seawater inside and outside the counterweight head.
In the scheme, the counterweight head is made of 316L stainless steel, does not contain lead blocks and does not pollute seawater.
In the scheme, the upper end of the shell of the counterweight head is provided with the internal thread for connecting the counterweight head with the sensor mounting end cover.
In the scheme, the data acquisition and processing circuit board, the power supply battery and the magnetic switch are arranged in the pressure-resistant cabin.
Through the technical scheme, the dragging type warm salt depth probe capable of eliminating the pressure oscillation phenomenon has the following beneficial effects:
1. the shell of the counterweight head is provided with three rows of holes, wherein the water inlet holes are arranged around the circumference of the front end of the counterweight head and are used for guiding seawater to enter the counterweight head, the middle hole is used for fully exchanging the seawater inside and outside the counterweight head, and the flow guide holes are used for guiding the seawater inside the counterweight head to be discharged and playing a role in eliminating turbulence, so that additional impact on the pressure sensor is avoided, and the accuracy of measured data is improved.
2. The middle hole and the flow guide hole are positioned on the same straight line, and the water inlet hole, the middle hole and the flow guide hole form an included angle of 30 degrees in the circumferential direction, so that the stability of a seawater flow field in the counterweight head can be ensured in the falling process of the probe, and the internal turbulence caused by the rotation of the probe due to the release of the mooring rope is avoided; and can guarantee that the speed of the fluid in the counterweight head is close to zero when reaching the pressure sensor, guarantee that the external water flow can not produce extra impact on the pressure sensor, and avoid the distortion of pressure data.
3. The temperature sensor, the conductivity sensor and the pressure sensor are all arranged on the sensor mounting end cover and are positioned on the same plane, so that the measured data of the temperature sensor, the conductivity sensor and the pressure sensor are all the same water layer, and the authenticity of the measured data is improved.
4. The diversion holes are inclined holes, the included angle between the central axis of the diversion holes and the central axis of the counterweight head is 33.75 degrees, and the inclined holes can improve the outflow speed of seawater in the counterweight head and prevent turbulent flow accumulation.
5. The foremost end of the counterweight head is of a platform structure, but not of a complete conical shape, and the platform structure is used for generating certain resistance when the probe falls, so that the function of adjusting the falling speed of the probe is achieved.
6. The pressure sensor is positioned in the center of the sensor mounting end cover, and no water inlet hole is formed in the center of the front end of the counterweight head, so that extra direct impact on the pressure sensor caused by seawater is avoided, and the possibility of generating a pressure oscillation phenomenon is further eliminated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a graph of pressure data measured by a conventional towed warm salt depth probe;
FIG. 2 is a schematic structural diagram of a towed warm salt depth probe according to an embodiment of the present invention;
FIG. 3 is a schematic plan view of a sensor mounting end cap according to an embodiment of the present invention;
FIG. 4 is a schematic view of the overall structure of the counterweight head according to the embodiment of the present invention;
FIG. 5 is a view illustrating an arrangement of water inlet holes according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a disclosed weight head according to an embodiment of the present invention;
FIG. 7 is a graph showing the results of simulated flow fields of examples of the present invention and comparative examples, wherein (a) is example 1, and (b) - (l) are comparative examples 1 to 11, respectively.
In the figure, 1, a counterweight head; 2. a pressure-resistant cabin; 3. a tail rod; 4. a sensor mounting end cover; 5. a pressure sensor; 6. a temperature sensor; 7. a conductivity sensor; 8. a water inlet hole; 9. a middle hole; 10. a flow guide hole; 11. a platform structure; 12. an internal thread.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
The invention provides a drag type warm salt depth probe capable of eliminating pressure oscillation phenomenon, which comprises a counterweight head 1, a pressure-resistant cabin 2 and a tail rod 3 which are sequentially connected as shown in figure 2. The counterweight head 1 is used for enabling the whole gravity center of the probe to be positioned at the lower part, so that the probe is always kept in a vertical state when working. The counterweight head 1 is made of 316L stainless steel, does not contain lead blocks and has no pollution to seawater.
And the data acquisition and processing circuit board, the power supply battery pack, the magnetic switch and other parts are arranged in the pressure-resistant cabin 2. A sensor mounting end cover 4 is mounted at the front end in the pressure-resistant cabin 2, and as shown in fig. 3, a pressure sensor 5, a temperature sensor 6 and a conductivity sensor 7 are mounted on the sensor mounting end cover 4; the three are in the same plane, and the data measured by the three are the same water layer. Wherein, pressure sensor 5 is located the center of sensor installation end cover 4, and temperature sensor 6 and conductivity sensor 7 distribute in pressure sensor 5's both sides, because there is not the inlet hole 8 in counter weight head 1 front end center department, consequently, the sea water can not produce extra direct impact to pressure sensor 5, and this has just further eliminated the possibility that produces pressure oscillation phenomenon.
The tail rod 3 is wound with a cable with a certain length, and the cable is gradually released until the release is finished along with the continuous falling of the probe during working. After the work is finished, the probe is recovered through the cable.
The interior of the counterweight head 1 is of a hollow structure, and the pressure sensor 5, the temperature sensor 6 and the conductivity sensor 7 are positioned in the inner cavity of the counterweight head 1. As shown in fig. 4, a shell of the counterweight head 1 is sequentially and uniformly provided with water inlet holes 8, middle holes 9 and flow guide holes 10 from bottom to top along the circumferential direction, the number of the water inlet holes 8, the number of the middle holes 9 and the number of the flow guide holes 10 are 6, wherein the water inlet holes 8 are used for guiding seawater to enter the counterweight head 1, as shown in fig. 5, the water inlet holes 8 are arranged around the periphery of the front end of the counterweight head 1, and no hole is formed in the middle of the counterweight head 1, so that the direct impact of the seawater on a sensor when the probe falls is eliminated; the middle holes 9 are uniformly arranged in the middle of the counterweight head 1 and are used for fully exchanging the seawater inside and outside the counterweight head 1; the diversion holes 10 are uniformly arranged at the rear part of the counterweight head 1 and used for guiding seawater in the counterweight head 1 to be discharged and playing a role in eliminating turbulence.
Particularly, the middle hole 9 and the flow guiding hole 10 are positioned on the same straight line, and the water inlet hole 8, the middle hole 9 and the flow guiding hole 10 are not positioned on the same straight line, but have an included angle of 30 degrees in the circumferential direction. Because around there being the hawser on the probe tail-rod 3, the hawser can release gradually at the probe whereabouts in-process, the release of hawser can produce certain moment of torsion to the probe in turn, lead to the probe to have slight rotation at the in-process that falls, consequently, with income water hole 8 and intermediate hole 9, the design has 30 dislocation between the water conservancy diversion hole 10, the stability in 1 inside flow field of counter weight head is visited in assurance that can be better, can guarantee simultaneously that 1 inside fluid of counter weight head is close to for zero when reacing pressure sensor 5 department, guarantee that outside rivers can not produce extra impact to pressure sensor 5, cause the distortion of pressure data.
In this embodiment, as shown in fig. 6, the diversion hole 10 is an inclined hole, and an included angle between a central axis of the diversion hole 10 and a central axis of the counterweight head 1 is 33.75 °. The inclined holes can improve the outflow speed of seawater in the counterweight head 1 and prevent turbulent accumulation.
The foremost end of the counterweight head 1 is not in a complete conical shape, but is in a platform structure 11, and is used for generating certain resistance when the probe falls, so that the function of adjusting the falling speed of the probe is achieved.
In this embodiment, the middle hole 9 is a strip-shaped hole, and the cross-sectional area of the middle hole 9 is larger than the cross-sectional areas of the water inlet hole 8 and the diversion hole 10, so as to be used for fully exchanging the seawater inside and outside the counterweight head 1.
The upper end of the housing of the counterweight head 1 is provided with internal threads 12 for connecting the counterweight head 1 with the sensor mounting end cap 4. The other end of the sensor mounting end cover 4 is connected with the pressure-resistant cabin 2.
Simulation:
according to the invention, a plurality of groups of comparative examples are arranged according to the number of the water inlet holes 8, the middle holes 9 and the flow guide holes 10, and the specific combination condition is shown in table 1.
Table 1 number of inlet holes 8, intermediate holes 9 and flow guide holes 10 of different comparative examples
The invention also provides a comparative example 10, and the water inlet hole 8, the middle hole 9 and the flow guide hole 10 are arranged on the same straight line.
The invention also provides a comparative example 11, and the diversion holes 10 are set to have no inclination angle, namely the angle between the central axis of the diversion hole 10 and the central axis of the counterweight head 1 is 90 degrees.
Aiming at the embodiment 1 and the comparative examples 1 to 11, the internal flow field condition is simulated by adopting a fluid mechanics Fluent method, the model simulation domain is the flow field in the cavity of the counterweight head 1, and after simulation calculation by simulation software, the flow field simulation results of the embodiment 1 and the comparative examples 1 to 11 are shown in (a) to (l) in fig. 7.
It can be seen from the flow field simulation result that, in the falling process of the probe, when external water flow enters the counterweight head 1, the unreasonable structural design of the comparative examples 1 to 11 can cause the water flow to collide with the inner wall of the counterweight head 1 and the sensor, the water flow can form a collision beam in the counterweight head 1, and the collision beam can influence the smooth outflow of the water flow, so that turbulent flow is generated, turbulent flow accumulation is caused, and the pressure oscillation phenomenon is generated.
The embodiment 1 of the invention has the advantages that no obvious impact phenomenon occurs after seawater enters the counterweight head 1, so that the seawater can be in more timely and sufficient contact with the temperature sensor 6 and the conductivity sensor 7, the real-time performance of data acquisition is improved, and the accuracy of data is further improved. In addition, it can be seen that in embodiment 1 of the present invention, the speed of the water flow tends to be static when the water flow approaches the position of the pressure sensor 5, and meanwhile, relatively strong turbulence does not exist, and the near-static water flow does not cause additional impact on the pressure sensor 5, so as to generate additional pressure, which affects the measurement accuracy of the pressure sensor 5.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A towed warm salt depth probe capable of eliminating pressure oscillation phenomena is characterized by comprising a counterweight head, a pressure-resistant cabin and a tail rod which are sequentially connected, wherein a sensor mounting end cover is mounted at the front end in the pressure-resistant cabin, and a pressure sensor, a temperature sensor and a conductivity sensor are mounted on the sensor mounting end cover; the inside hollow structure that is of counterweight head, pressure sensor, temperature sensor and conductivity sensor are located the inside cavity of counterweight head, income water hole, well hole and water conservancy diversion hole have evenly been seted up along the circumferencial direction in proper order on counterweight head's the casing from bottom to top, the quantity in income water hole, well hole and water conservancy diversion hole is 6, just well hole and water conservancy diversion hole site are on same straight line, it has 30 contained angles with well hole and water conservancy diversion hole on the circumferencial direction to go into the water hole.
2. The towed warm salt depth probe capable of eliminating the pressure oscillation phenomenon according to claim 1, wherein the diversion holes are inclined holes, and an included angle between a central axis of the diversion holes and a central axis of the counterweight head is 33.75 °.
3. The towed warm salt depth probe capable of eliminating pressure oscillations according to claim 1, wherein the pressure sensor is located at the center of the sensor mounting end cap, and the temperature sensor and the conductivity sensor are distributed at both sides of the pressure sensor.
4. The towed warm salt depth probe capable of eliminating the pressure oscillation phenomenon of claim 1, wherein the foremost end of the counterweight head is a platform structure.
5. The towed warm salt depth probe capable of eliminating the pressure oscillation phenomenon of claim 1, wherein the middle hole is a strip-shaped hole, and the cross-sectional area of the middle hole is larger than the cross-sectional areas of the water inlet hole and the diversion hole.
6. The towed warm salt depth probe capable of eliminating pressure oscillations according to claim 1, wherein said counterweight head is 316L stainless steel.
7. The towed warm salt depth probe capable of eliminating pressure oscillations according to claim 1, wherein the counterweight head has an internal thread at the upper end of the housing for connecting the counterweight head to the sensor mounting end cap.
8. The towed warm salt depth probe capable of eliminating the pressure oscillation phenomenon according to claim 1, wherein the pressure-resistant cabin is internally provided with a data acquisition and processing circuit board, a power supply battery and a magnetic switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210356926.9A CN114427889B (en) | 2022-04-07 | 2022-04-07 | Dragging type warm salt depth probe capable of eliminating pressure oscillation phenomenon |
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| CN202210356926.9A CN114427889B (en) | 2022-04-07 | 2022-04-07 | Dragging type warm salt depth probe capable of eliminating pressure oscillation phenomenon |
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| CN114427889B CN114427889B (en) | 2022-06-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115218874A (en) * | 2022-09-20 | 2022-10-21 | 青岛道万科技有限公司 | Shipborne disposable depth thermometer and use method thereof |
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Cited By (2)
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| CN115218874B (en) * | 2022-09-20 | 2023-01-17 | 青岛道万科技有限公司 | Shipborne disposable depth thermometer and use method thereof |
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| Publication number | Publication date |
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| CN114427889B (en) | 2022-06-17 |
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Application publication date: 20220503 Assignee: Jinan Shijin Instrument Co.,Ltd. Assignor: SHANDONG University OF SCIENCE AND TECHNOLOGY Contract record no.: X2023980041394 Denomination of invention: A drag type temperature salt depth probe that can eliminate pressure oscillation phenomenon Granted publication date: 20220617 License type: Common License Record date: 20230907 |