CN108917853B - Temperature and salt depth sensor and control method thereof - Google Patents
Temperature and salt depth sensor and control method thereof Download PDFInfo
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- CN108917853B CN108917853B CN201810984262.4A CN201810984262A CN108917853B CN 108917853 B CN108917853 B CN 108917853B CN 201810984262 A CN201810984262 A CN 201810984262A CN 108917853 B CN108917853 B CN 108917853B
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- 150000003839 salts Chemical class 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000523 sample Substances 0.000 claims abstract description 34
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 90
- 229910052697 platinum Inorganic materials 0.000 claims description 45
- 238000003756 stirring Methods 0.000 claims description 31
- 239000013535 sea water Substances 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000005070 sampling Methods 0.000 description 11
- 239000013049 sediment Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Physics & Mathematics (AREA)
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention belongs to the technical field of ocean exploration instruments, and relates to a temperature and salt depth sensor and a control method. The temperature and salt depth sensor comprises a conductivity sensor, a temperature sensor, a pressure sensor and a control main board, wherein the temperature sensor and the pressure sensor are respectively connected with the conductivity sensor; the temperature sensor, the pressure sensor and the conductivity sensor are all connected with the control main board through wires, and the conductivity sensor comprises a conductivity probe, a supporting plate and a column body; the conductivity probe is fixed on the upper surface of the supporting plate, and the column body is fixed on the lower surface of the supporting plate; and the column body is provided with a conductive wire through hole and a through hole for installing a temperature sensor and a pressure sensor. According to the temperature and salt depth sensor and the control method, the thermistor and the pressure sensor are integrated by utilizing the horizontal cross section inside the conductivity sensor probe, so that the accuracy of measured data can be improved, and the defects of unreliable monitoring data and the like in the prior art are overcome.
Description
Technical Field
The invention belongs to the technical field of ocean exploration instruments, and relates to a temperature and salt depth sensor and a control method.
Background
In the field of marine research, temperature, salinity and depth are essential marine hydrologic elements, and are one of the most important observation projects in marine investigation and environmental monitoring.
The deep sea sampling system comprises a water sampler, a microorganism concentration pressure maintaining sampler, a seabed sediment sampler, on-site measurement and analysis of seabed sediment characteristics and other system equipment, and high-quality temperature and salt depth data are required for sea water sample layered sampling and precise control of seabed sampling. When the deep sea sampling system collects samples from thousands of meters of high-pressure low-temperature deep sea and recovers the samples to the environment with normal temperature and normal pressure, the characteristics of the collected samples can change due to the change of factors such as temperature, salinity, depth and the like, for example, part of dissolved gas in the samples can escape and lose due to supersaturation, so that analysis data cannot truly reflect component composition information of the deep sea in-situ samples, and the characteristic inversion calculation and modeling of the deep sea sampling samples are affected. As the deep sea sampling system works on the sea bottom, a large amount of sediment produces disturbance on the measurement of the temperature and salt depth, and the measurement accuracy of the temperature and salt depth data is reduced. The existing temperature and salt depth measuring instrument in the market has defects in the aspects of a protective structure, a sensor probe structure, a control method and the like, and cannot be well suitable for application requirements of deep sea sampling temperature and salt depth on-site measurement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a temperature and salt depth sensor.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the temperature and salt depth sensor comprises a conductivity sensor, a temperature sensor, a pressure sensor and a control main board, wherein the temperature sensor and the pressure sensor are respectively connected with the conductivity sensor; the temperature sensor, the pressure sensor and the conductivity sensor are all connected with the control main board through wires, and the temperature sensor, the pressure sensor and the conductivity sensor are characterized in that: the conductivity sensor comprises a conductivity probe, a supporting plate and a column body; the conductivity probe is fixed on the upper surface of the supporting plate, and the column body is fixed on the lower surface of the supporting plate; and the column body is provided with a conductive wire through hole and a through hole for installing a temperature sensor and a pressure sensor.
Further, the conductivity sensor comprises a conductivity probe and a column body; the conductivity probe comprises an arch-shaped conductivity cell and seven arch-shaped platinum electrodes arranged in the arch-shaped conductivity cell, each platinum electrode is provided with a corresponding bonding pad and a wire, and the wires of the seven electrodes are connected to the control main board through the conductivity wire through holes.
Furthermore, the seven arch-shaped platinum electrodes are arranged in the arch-shaped conductivity cell at equal intervals of 1-3 cm.
Further, the seven arch-shaped platinum electrodes, wherein the thickness of the 1 st, 4 th and 7 th arch-shaped platinum electrodes is the same; the thicknesses of the 2 nd, 3 rd, 5 th and 6 th arch-shaped platinum electrodes are the same; and the thickness of the 1 st, 4 th and 7 th arch-shaped platinum electrodes is twice the thickness of the remaining 4 arch-shaped platinum electrodes.
Further, the seven arch-shaped platinum electrodes, wherein the thicknesses of the 1 st, 4 th and 7 th arch-shaped platinum electrodes are 2-6 mm, and the thicknesses of the other 4 arch-shaped platinum electrodes are 1-3 mm.
Preferably, the probes of the temperature sensor and the pressure sensor penetrate through the through holes formed in the supporting plate and extend into the arch-shaped conductive pool and are arranged on the same horizontal plane of the inner cross section of the arch-shaped conductive pool in a sealing manner.
Preferably, in order to better adapt to the application environment of deep sea sampling, the temperature and salt depth sensor also comprises a stirring device, wherein the stirring device consists of a motor, a connecting rod and a stirring brush; the stirring brush is connected with the motor through the connecting rod, the stirring brush is also installed inside the arch-shaped conducting pool, and the motor is connected to the control main board through a wire.
Preferably, in order to enhance the protection effect on the temperature and salt depth sensor, an end cover and a cabin body are arranged outside the temperature and salt depth sensor, and the end cover is positioned at the top of the cabin body; the control main board is arranged in the cabin body, and the conductivity sensor, the temperature sensor and the pressure sensor are arranged on the upper part of the end cover.
Furthermore, a plurality of protection brackets are arranged at the circumference of the edge of the end cover at equal intervals, and a protection filter screen parallel to the end cover is arranged at the top end of each protection bracket; the installation position of the protective bracket should avoid the entrance and exit of the arch-shaped conductive pool, and can not block seawater from entering the inside of the arch-shaped conductive pool, and the distance between the protective bracket and the edge of the entrance and exit is more than 2 cm.
In order to achieve the purpose of the invention, the invention also provides a control method of the temperature and salt depth sensor, which comprises the following steps:
(1) Before measuring data, a control main board in the temperature and salt depth sensor cabin body starts a stirring device to work for 1-60 seconds;
(2) After waiting for 1-10 seconds, stopping the stirring device, controlling the main board to start collecting data of measured temperature, conductivity and pressure, converting the data into salinity data, combining the salinity data with the measured time and serial number into a data packet, and storing the data packet into the main board;
(3) And the temperature and salt depth sensor continuously works for about 30 minutes, the main board is controlled to start the stirring device again to work for 1-60 seconds, and the temperature and salt depth sensor waits for 1-10 seconds to perform temperature and salt depth data measurement work of the next period.
The temperature, conductivity and pressure data acquisition time interval can be set by controlling the main board, and the interval time setting range is 0.2-60 seconds.
Of course, depending on the sea conditions, the control main board can also be set to not start the stirring device so as to measure the temperature and salt depth data in the sea water more quickly.
The invention relates to a temperature and salt depth sensor and a control method, which utilize a thermistor and a pressure sensor integrated in the horizontal cross section of the inside of a conductivity sensor probe, and adopt a series of methods of driving and controlling a direct current motor stirring brush to enhance the fluidity of the measured seawater in a conductivity cell, installing a protection filter screen to reduce disturbance of seawater impurities and the like, and eliminate and inhibit the defects and defects of the prior art such as performance failure, unreliable monitoring data and the like of the temperature and salt depth sensor caused by sediment settlement and surging, microorganism adhesion, unsmooth seawater flow in the inside of the conductivity probe and the like under a deep sea sampling application environment. The temperature and salt depth sensor has the working capacity of long-term online and self-contained measurement, can be applied to deep sea in-situ observation platforms such as a submarine observation network and the like, can also be used as a main carrying instrument of a profile automatic observation platform such as an underwater glider and the like, and has important significance for improving the data quality of the temperature and salt depth sensor.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a warm salt depth sensor of the present invention;
FIG. 2 is a schematic longitudinal bottom view of the structure of the conductivity probe;
FIG. 3 is a schematic longitudinal elevational view of a conductivity sensor structure;
FIG. 4 is a schematic side view of the structure of an arch-shaped platinum electrode within the conductivity probe;
Fig. 5 is a schematic structural view of the stirring device.
Detailed Description
The temperature and salt depth sensor and the control method thereof according to the present invention will be described in detail with reference to the accompanying drawings and examples.
The salt-temperature depth sensor of the present embodiment shown in fig. 1 is a sensor suitable for a deep sea sampling system, and includes the following main components: conductivity sensor, temperature sensor and pressure sensor, control mainboard, end cover, cabin body. The end cap 30 and the capsule 29 are the external guard and support structure of the entire sensor, with the end cap 30 mounted on top of the capsule 29. A control motherboard 28 is mounted inside the cabin. The upper part of the end cover is provided with a conductivity sensor, a temperature sensor, a pressure sensor and a stirring device.
As shown in fig. 2 and 3, the conductivity sensor includes a conductivity probe 3, a support plate 31, and a cylinder 13. The conductivity probe 3 is fixed on the upper surface of the support plate 31, and the column 13 is fixed on the lower surface of the support plate 31. The lower end of the cylinder 13 is provided with external threads which are matched with internal threads arranged on the end cover 30, and is provided with an O-shaped sealing ring, and then the two are screwed and installed by a tool. In order to facilitate the installation of the temperature sensor, the pressure sensor and the stirring device, corresponding through holes are formed in the support plate 31 and in the column 13.
As shown in fig. 2, 3 and 4, an arch-shaped conductivity cell 4 is arranged in the middle of the conductivity probe 3, and a first arch-shaped platinum electrode 5, a second arch-shaped platinum electrode 6, a third arch-shaped platinum electrode 7, a fourth arch-shaped platinum electrode 8, a fifth arch-shaped platinum electrode 9, a sixth arch-shaped platinum electrode 10 and a seventh arch-shaped platinum electrode 11 are arranged in the arch-shaped conductivity cell 4. Each platinum electrode has a corresponding pad and wire, such as first arch-shaped platinum electrode 5 connected to platinum electrode pad 12 and in turn to first arch-shaped platinum electrode wire 14. As shown in fig. 3, seven platinum electrode wires are respectively sleeved with heat shrink tubes, and then are connected with the seven-electrode packaging protection sleeve 15 with electromagnetic interference resistance through the hole grooves 32 in the supporting plate 31. The seven-electrode packaging protective sleeve 15 is connected to the control motherboard 28 in the cabin 29 via the conductive wire through-holes 16 provided in the column 13.
Seven arch-shaped platinum electrodes are arranged in the arch-shaped conductivity cell 4 at equal intervals, and the interval between adjacent platinum electrodes is 1-3 cm. The thickness of the first arch-shaped platinum electrode 5, the fourth arch-shaped platinum electrode 8 and the seventh arch-shaped platinum electrode 11 is 4mm; the thickness of the second arch-shaped platinum electrode 6, the third arch-shaped platinum electrode 7, the fifth arch-shaped platinum electrode 9 and the sixth arch-shaped platinum electrode 10 is 2mm. Experiments prove that the arch-shaped platinum electrode has good chemical reaction performance with the seawater to be tested, a strong electric field is established in the seawater fluid medium, and a strong induction voltage is provided for the detection signal of the control main board 28.
As shown in FIG. 1, the temperature sensor is a high-performance thermistor, and comprises a thermistor probe 20, a thermistor packaging shell 21 and a thermistor lead 22. The thermistor housing 21 is installed in a cylindrical through hole formed in the column 13, the thermistor probe 20 penetrates through the through hole formed in the support plate 31 and goes deep into the arch-shaped conductivity cell 4 of the conductivity probe 3, and the thermistor lead 22 is connected to the control main board 28 in the cabin 29.
The pressure sensor consists of a pressure sensor package housing 18, a pressure sensor probe 17 and a pressure sensor wire 19. The pressure sensor package housing 18 is mounted in a corresponding cylindrical through hole of the column 13, the pressure sensor probe 17 extends into the arch-shaped conductivity cell 4 of the conductivity probe 3 through a through hole formed in the support plate 31, and the pressure sensor wire 19 is connected to the control main board 28 in the cabin 29.
Here, the thermistor probe 20 and the pressure sensor probe 17 are surely installed on the same level as the inner cross section of the arch-shaped conductivity cell 4, and are hermetically sealed. When the seawater to be measured flows through the arch-shaped conductivity cell 4, the temperature, conductivity and pressure data measured by the temperature and salt depth sensor ensure the consistency of measurement time and position. Substituting the acquired temperature, conductivity and pressure data into a formula to calculate according to a salinity international standard calculation formula, thereby obtaining salinity data.
As a preferred embodiment of the present invention, the stirring device of this embodiment is composed of a dc motor 25, a motor dynamic sealing device 26, a connecting rod 24, a propeller type stirring brush 23 and a dc motor wire 27, as shown in fig. 5, for better adapting to the application environment of deep sea sampling. The direct current motor 25 is connected with the propeller type stirring brush 23 through a motor dynamic sealing device 26 and a connecting rod 24. The lower end of the stirring device is arranged in a corresponding cylindrical through hole of the conductivity column 13, a propeller type stirring brush 24 is also arranged on the inner cross section of the arch-shaped conductivity cell 4 of the conductivity probe 3, and a direct current motor 25 drives a motor dynamic sealing device 26 and a connecting rod 24 so as to drive the propeller type stirring brush 23 to work. The main flow motor 25 is connected by means of a direct current motor lead 27 to a control main board 28 in the cabin 29.
The propeller type stirring brush 24 can enhance the fluidity of the seawater to be measured in the arch-shaped conductivity cell 4, remove sediment and impurities accumulated in the arch-shaped conductivity cell 4 in the deep sea, and has cleaning effect on seven arch-shaped platinum electrodes, the thermistor probe 20 and the pressure sensor probe 17, thereby improving the measurement accuracy of the temperature and salt depth data.
As a preferred embodiment of the present invention, the end cap 30 is provided with 4 guard brackets 2 at equal intervals along the circumference. At the top end of the protective bracket 2, a protective screen 1 parallel to the end cover 30 is installed. The mounting position of the protective bracket 2 ensures that the front and rear entrances and exits of the arch-shaped conductivity cell 4 of the conductivity probe 3 cannot be blocked, and the distance from the edge of the entrances and exits is more than 2 cm. The protective filter screen 1 can filter larger seawater impurities and has the anti-collision and impact protection effects on the conductivity probe 3 of the temperature and salt depth sensor.
Embodiment 2 this embodiment is a control method of the temperature and salt depth sensor of the present invention, and specific steps and procedures are as follows:
(1) Before measuring data, a control main board 28 in a temperature and salt depth sensor cabin 29 drives a direct current motor 25 to drive a propeller type stirring brush 24 to work for 10 seconds, and waits for 5 seconds;
(2) The control main board 28 starts to collect the measured temperature, conductivity and pressure data, converts the data into salinity data, combines the salinity data with the measured time and serial number into a data packet, and stores the data packet in the control main board 28. The control motherboard 28 can set temperature, conductivity and pressure data acquisition time intervals ranging from 0.2 seconds to 1 minute;
(3) And the temperature and salt depth sensor continuously works for 30 minutes, the control main board 28 starts the direct current motor 25 again to drive the propeller type stirring brush 24 to work for 10 seconds, waits for 5 seconds, and performs temperature and salt depth data measurement work of the next period.
It should be noted that the operation time and the waiting time of the propeller type stirring brush 24 described above may be set. The propeller agitator brush 24 has an on time setting ranging from 1 second to 60 seconds and a standby time setting ranging from 1 second to 10 seconds. Of course, depending on sea conditions, the control main board 28 may be configured not to start the dc motor 25 to measure the temperature and salt depth data in the sea water more quickly.
The temperature and salt depth sensor and the control method can also be widely applied to general ocean monitoring and investigation and research work, and provide accurate basic hydrodynamics parameters such as temperature and salt depth for deep sea research.
Claims (7)
1. The temperature and salt depth sensor comprises a conductivity sensor, a temperature sensor, a pressure sensor and a control main board, wherein the temperature sensor and the pressure sensor are respectively connected with the conductivity sensor; the temperature sensor, the pressure sensor and the conductivity sensor are all connected with the control main board through wires, and the temperature sensor, the pressure sensor and the conductivity sensor are characterized in that: the conductivity sensor comprises a conductivity probe, a supporting plate and a column body; the conductivity probe is fixed on the upper surface of the supporting plate, and the column body is fixed on the lower surface of the supporting plate; the column body is provided with a conductive wire through hole and a through hole for installing a temperature sensor and a pressure sensor; the conductivity probe comprises an arch-shaped conductivity cell and seven arch-shaped platinum electrodes arranged in the arch-shaped conductivity cell, each platinum electrode is provided with a corresponding bonding pad and a lead, and the leads of the seven electrodes are connected to the control main board through the conductivity lead through holes; the seven arch-shaped platinum electrodes have the same thickness as the 1 st, 4 th and 7 th arch-shaped platinum electrodes; the thicknesses of the 2 nd, 3 rd, 5 th and 6 th arch-shaped platinum electrodes are the same; and the thickness of the 1 st, 4 th and 7 th arch-shaped platinum electrodes is twice that of the rest 4 arch-shaped platinum electrodes; the seven arch-shaped platinum electrodes are arranged in the arch-shaped conductivity cell at equal intervals of 1-3 cm.
2. The warm salt depth sensor of claim 1, wherein: the thickness of the 1 st, 4 th and 7 th arch-shaped platinum electrodes is 2-6 mm; the thickness of the 2 nd, 3 rd, 5 th and 6 th arch-shaped platinum electrodes is 1-3 mm.
3. The warm salt depth sensor of claim 1, wherein: the probes of the temperature sensor and the pressure sensor penetrate through the through holes formed in the supporting plate and extend into the arch-shaped conductive pool and are arranged on the same horizontal plane of the inner cross section of the arch-shaped conductive pool in a sealing mode.
4. The warm salt depth sensor of claim 1, wherein: the stirring device consists of a motor, a connecting rod and a stirring brush; the stirring brush is connected with the motor through the connecting rod, the stirring brush is arranged in the arch-shaped conductive tank, and the motor is connected to the control main board through a wire.
5. The warm salt depth sensor of any one of claims 1-4, wherein: an end cover and a cabin body are arranged outside the temperature and salt depth sensor, and the end cover is positioned at the top of the cabin body; the control main board is arranged in the cabin body, and the conductivity sensor, the temperature sensor, the pressure sensor and the stirring device are arranged on the upper part of the end cover.
6. The warm salt depth sensor of claim 5, wherein: a plurality of protection brackets are arranged at equal intervals along the circumference of the edge of the end cover, and a protection filter screen parallel to the end cover is arranged at the top end of each protection bracket; the installation position of the protective bracket should avoid the entrance and exit of the arch-shaped conductive pool, can not block seawater from entering the inside of the arch-shaped conductive pool, and is separated from the edge of the entrance and exit by more than 2 cm.
7. The control method of a warm salt depth sensor according to any one of claims 1 to 4, comprising the steps of:
(1) Before measuring data, a control main board in the temperature and salt depth sensor cabin body starts a stirring device to work for 1-60 seconds;
(2) After waiting for 1-10 seconds, stopping the stirring device, controlling the main board to start collecting data of measured temperature, conductivity and pressure, converting the data into salinity data, combining the salinity data with the measured time and serial number into a data packet, and storing the data packet into the main board;
(3) And continuously operating the temperature and salt depth sensor for 30 minutes, controlling the main board to start the stirring device again to operate for 1-60 seconds, and waiting for 1-10 seconds, and then performing temperature and salt depth data measurement operation of the next period.
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CN110412080B (en) * | 2019-07-03 | 2021-12-21 | 山东省科学院海洋仪器仪表研究所 | Temperature, salinity and depth sensor and control method for inhibiting thermal hysteresis effect |
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