40 results about "Salinity measurement" patented technology

A soil parameter measurement arrangement includes a capacitive based soil moisture and salinity sensor, a predetermined moisture migration medium located in a volume adjacent said sensor so that the medium substantially occupies the field of influence of said sensor. The medium is in moisture communication with the soil to be measured, and said sensor is adapted to measure and produce data representative of the volumetric water content of said medium. A sensor data processing means determines both the soil moisture and salinity of said medium. By using the measured volumetric soil moisture content and the moisture release curve of the medium, it is possible to derive the matric potential of the soil. The measured salinity of the medium corresponds to the salinity of the soil that is in moisture communication with the medium.

The invention discloses a continuous observation system for dissolving of methane in a surface water body, relating to greenhouse gas monitoring equipment. The continuous observation system is provided with a surface water pump, filtering equipment, temperature and salinity measurement equipment, a flow controller, a water-vapor balance device, a temperature probe, a gas pump, a cold trap, a waterproof electrode, a filtering device, an off-axis integral cavity output spectrum detector, a valve and a standard gas cylinder; a water inlet of the surface water pump is arranged underwater, a water outlet of the surface water pump is connected with an inlet of the filtering equipment, an outlet of the filtering equipment is connected with the temperature and salinity measurement equipment, an outlet of the temperature and salinity measurement equipment is connected with an inlet of the flow controller, an outlet of the flow controller is connected with the balance device which is communicated with the atmosphere, an air outlet formed in the upper part of the balance device is connected with a gas inlet of the gas pump, the temperature probe is arranged in the balance device, a gas outlet of the gas pump is connected with an inlet of the cold trap, an outlet of the cold trap is connected with the waterproof electrode, an outlet of the waterproof electrode is connected with an inlet of the filtering device, an outlet of the filtering device is connected with an inlet of the detector, and an outlet of the standard gas cylinder is connected with the balance device and the detector through the valve respectively.

An electronic salt meter including a sensor rod, salt meter body and receiving components to measure a temperature and salinity. The electronic salt meter includes a first and sensor electrode and a temperature sensor to detect a temperature of the measurement object. A measurement monitoring unit detects whether the first and second sensor electrodes are electrically connected to each other. A salinity measurement unit applies an AC power to the first and second sensor electrodes to measure salinity of the measurement object. A temperature measurement unit applies a power to the temperature sensor to measure the temperature of the measurement object. A thermal equilibrium detection unit stores the temperature value previously measured, and when the temperature variation is less than a predetermined threshold, it is determined as a thermal equilibrium state. A room-temperature salinity conversion unit converts the salinity value into a salinity value at room temperature.

The invention belongs to the technical field of fiber sensing and discloses a reflective fiber sensor for simultaneous measurement of seawater salinity and the temperature. The sensor comprises a halogen light source, a Y-type fiber, a sensing unit, a spectrometer and a host computer, wherein the halogen light source is connected with the sensing unit through a branch of the Y-type fiber, the sensing unit is connected with the spectrometer through another branch of the Y-type fiber, the spectrometer is connected with the host computer, the sensing unit is formed by a multi-mode fiber and a single-mode fiber which are cascaded, the multi-mode fiber and the single-mode fiber are coaxially welded, an outer surface and an end surface of the single-mode fiber are plated with a gold film, and outer periphery of the gold film is plated with a temperature sensitive film from a welding end of the single-mode fiber to the half-length position of the single-mode fiber. The sensor is advantaged inthat not only can simple manufacturing process, low cost and stable structure be achieved, but also, through simultaneous measurement of seawater salinity and the temperature, influence of the temperature on seawater salinity measurement accuracy can be effectively reduced.

The invention discloses a salinity sensor using ionic conductivity, salinity measuring system and method thereof, wherein the salinity sensor is mounted in a container for storing food or solution, in order to prevent the chlorine ion conductivity from descending due to ion accumulating in the probe along with the measuring time lapsing during measuring the salinity, the ion accumulating in the probe is arbitrarily released to prevent the salinity measurement error from generating.

The invention discloses a salinity measurement method. The salinity measurement method specifically comprises the following steps: 1, solving the conductivity of a salt solution by calculation formulas of salinity temperature and conductivity when the salinity and the temperature are known; 2, substituting the solved conductivity into a calculation formula of a plane circular electrode model and establishing a relation between a sensor resistance and the salinity and temperature; 3, substituting an output voltage value of a sensor into a charging / discharging formula of a sensor resistance-capacitance network, and solving a resistance value of the other group of sensor; and 4, carrying out curve fitting to establish two groups of formulas of resistance values, which are obtained by calculation, and determining relative parameters, so as to establish a function relation of salinity, temperature and voltage. With the adoption of the salinity measurement method, the acquisition amount of calibrated data is extremely reduced through the plane circular electrode model which is established by salinity measurement, so that the calibration efficiency is improved, the calculation speed is accelerated and the influences of temperature effect are reduced, and furthermore, the salinity measurement accuracy is remarkably improved.

The invention discloses a seawater salinity measurement system and method based on an orthogonal phase-locked amplification technology. The system comprises a constant temperature water bath in whicha conductive cell, a spiral coil, a stirrer and a constant temperature device; the conductive cell, the stirrer and the constant temperature device are all connected with the detection control device;the detection control device is also connected with a multiport valve, a peristaltic pump and a computer terminal; the multiport valve is a three-in one-out multi-ported valve, the inputs are separately connected with an ultrapure water storage tank, a sample seawater storage tank and a standard seawater storage tank, and the output is connected with the inlet of the conductive cell via the peristaltic pump and the spiral coil; two current electrodes and two voltage electrodes are arranged in the conductive cell, and the current electrodes are nanoscale platinized composite oxide electrodes;the voltage electrodes are silver / silver chloride reference electrodes; and the detection control device adopts the digital orthogonal phase-locked amplification technology, and a phase-locked moduleis implemented by FPGA through digital programming. The method provided by the invention is convenient and quick to operate and high in test efficiency, and has relatively high-performance indexes.

The invention provides a method for evaluating the stability of an ocean electrode type conductivity sensor. The method comprises the following steps of: S1, preparing before an experiment, cleaning a sacrificial anode, a conductivity sensor and related instruments, and adjusting an experimental environment to ensure the accuracy of an experimental result; S2, testing conductivity values measured by the conductivity sensor at different temperatures by changing the temperature; S3, placing all seawater samples and a laboratory salinity meter in a salinity measurement laboratory, placing the seawater samples and the laboratory salinity meter at a constant temperature for a period of time, measuring the standard salinity of the seawater samples, calculating the standard salinity value, and calculating the standard conductivity value according to the standard temperature value; and S4, calculating the conductivity stability of the conductivity sensor according to the conductivity value measured by the conductivity sensor and the standard conductivity value. According to the evaluation method, the stability index of the ocean electrode type conductivity sensor can be reasonably, truly and effectively evaluated, and the industry blank of the method is filled.

The invention relates to a multi-channel salinity online measuring system, belonging to the technical field of automatic detection. The automatic measuring system capable of simultaneously measuring multi-point salinity comprises a sinusoidal signal generating circuit, a channel selection circuit, measuring electrodes, a signal collection conversion circuit, a microcontroller circuit, a remote communication circuit and computer application software. Full-wave sampling is carried out on measuring signals, and the area of a region encapsulated by the wave period is derived by a microcontroller and is in direct proportion to the salinity to realize high-precision salinity measurement. Multi-point salinity measurement is realized by the unique channel selection circuit, the measuring signal is remotely transferred by the remote communication circuit, data and drawing curves are automatically stored by the application software, and the influence on the flow field of a fluid to be measured is greatly lessened by the designed ultrafine measuring electrodes. The multi-point salinity measuring system has low cost and high precision and can be widely applied to scientific research and experiments.

The invention discloses a contact type road condition detecting system which comprises two light sources, a detector and a temperature sensor. The two light sources, the detector and the temperature sensor are integrated into a machine seat, the two light sources can respectively emit light, and the detector is used for receiving reflection light emitted by the two light sources and scattered by a road surface. The contact type road condition detecting system further comprises a positive electrode and a negative electrode which are arranged beside the temperature sensor, the positive electrode and the negative electrode are respectively installed in the machine seat, one end of the positive electrode and one end of the negative electrode are both exposed out of the road surface, and the light sources, the detector, the temperature sensor, the positive electrode and the negative electrode are all connected with a microprocessor. The contact type road condition detecting system is of a structure of the two light sources and one single detector, is simple and compact, is convenient to dismount, maintain, detect and update, and reduces production cost. The positive electrode and the negative electrode are used for detecting the water salinity on the road surface. The temperature sensor arranged beside the electrodes can measure environmental temperature and can serve as environmental monitoring for conductivity measurement to carry out temperature compensation. Thus, salinity measurement is more accurate, and functions are more comprehensive.

The invention discloses a salinity measurement method. The salinity measurement method specifically comprises the following steps: 1, solving the conductivity of a salt solution by calculation formulas of salinity temperature and conductivity when the salinity and the temperature are known; 2, substituting the solved conductivity into a calculation formula of a plane circular electrode model and establishing a relation between a sensor resistance and the salinity and temperature; 3, substituting an output voltage value of a sensor into a charging / discharging formula of a sensor resistance-capacitance network, and solving a resistance value of the other group of sensor; and 4, carrying out curve fitting to establish two groups of formulas of resistance values, which are obtained by calculation, and determining relative parameters, so as to establish a function relation of salinity, temperature and voltage. With the adoption of the salinity measurement method, the acquisition amount of calibrated data is extremely reduced through the plane circular electrode model which is established by salinity measurement, so that the calibration efficiency is improved, the calculation speed is accelerated and the influences of temperature effect are reduced, and furthermore, the salinity measurement accuracy is remarkably improved.

The invention discloses a continuous observing system of dissolving nitrous oxide in a water body in a surface layer, and relates to monitoring equipment of greenhouse gases. The system is provided with a surface-layer water pump, filter equipment, temperature and salinity measurement equipment, a flow controller, a water vapor balancer, a temperature probe, a cold well, a gas pump, a waterproof electrode, an output spectrum detector of an off-axis integral chamber and a standard gas cylinder, wherein a water inlet of the surface-layer water pump is installed in water, a water outlet of the surface-layer water pump is connected with an inlet of the filter equipment, the outlet of the filter equipment is connected with the temperature and salinity measurement equipment, the outlet of the temperature and salinity measurement equipment is connected with the inlet of the flow controller, the outlet of the flow controller is connected with the water vapor balancer, an air outlet arranged at the upper part of the water vapor balancer is connected with the inlet of the cold well, the temperature probe is arranged in the water vapor balancer, the outlet of the cold well is connected with the inlet of the gas pump, the outlet of the gas pump is connected with the waterproof electrode, the outlet of the waterproof electrode is connected with the inlet of the detector and the outlet of the standard gas cylinder, the output end of the detector is connected with an auxiliary balancer which is arranged at the bottom in the water vapor balancer, and a wastewater outlet is formed at the bottom of the water vapor balancer.

The invention discloses a sewage feature evaluating and insulator equipping method for coastal areas. The method comprises the following steps: firstly judging whether an area to be measured is a coastal area or not according to the field salinity and salinity threshold value of the area to be measured; when salinity measurement conditions are lacked, judging the distance between the area to be measured and a coastline according to topographical parameters of the area to be measured, so as to judge whether the area to be measured is the coastal area or not; judging whether the area to be measured is an urban or industrial area according to the distance between the area to be measured and the urban area or a pollution source; judging whether the area to be measured is a mountain forest or cultivation area according to the distance between the area to be measured and a forest region or a farmland; judging whether the area to be measured is a river or a lake land according to the distance between the area to be measured and a water area; and equipping insulators according to evaluation results. The method provided by the invention is applied to practical engineering, sewage features can be quickly estimated according to geographic features when external insulation work is carried out in areas lacking equivalent salt deposit density data, and then the types and insulation levels of the insulators are quickly determined.

The invention relates to a salinity meter with a suction pump protecting device, which comprises a salinity meter main body with a suction pump and a sump and is characterized by also comprising the suction pump protecting device, wherein the upper end of the suction pump protecting device is connected with the inlet end of the suction pump, while the lower end is inserted into the sump; a tubular body in the suction pump protecting device is divided into three cavities by a valve seat and a director from the top to bottom, namely the cavity wall side above the valve seat is provided with a safety valve communicated with the external atmosphere by means of an air inlet; the cavity wall side between the valve seat and the director is provided with an air inlet hole; and a floater is arranged in the cavity under the director, a valve rod passing through the director is fixed in the axial direction of the floater, and the top of the valve rod is provided with a valve head. The valve head prevents waste liquor from entering the suction pump along with the rise of the liquor level. The salinity meter has simple process, eliminates corrosion even burning of the suction pump caused by ambient environment and improper human operation, ensures the continuity and stability of field salinity measurement, prolongs the service life and reduces the maintenance charge.

The invention discloses an intelligent fish tank cloud hosting system. A intelligent fish tank comprises a fish tank processer, a water quality sensor and a water quality adjustment mechanism corresponding to the water quality sensor, further comprises a cloud server and a smart phone and sends water quality parameters detected by the water quality sensor to the cloud server through a communication module; the smart phone is provided with a fish culture parameter setting module; the cloud server is provided with the following function modules of a fish culture parameter storage module for storing fish culture parameters uploaded by users' smart phones, a water quality analysis module for analyzing water quality conditions according to the water quality parameters uploaded by the intelligent fish tank and a water quality adjustment module for calculating out a water quality adjustment scheme according to the water quality conditions and the fish culture parameters and sending the water quality adjustment scheme to the intelligent fish tank. The invention further discloses a water quality adjustment method. The adjustment method comprises the steps of collecting a PH value and a salinity measurement value, comprehensively considering the mutual influence between PH value adjustment and salinity adjustment, and preferentially adjusting the PH value and then adjusting the salinity value after the PH value reaches an equilibrium state.

The invention discloses a seawater salinity and temperature detection device based on double-bend long-period fiber gratings and a use method. A measurement sensing part of the seawater salinity and temperature detection device comprises three LPFGs, a traction rope, three pulleys, a weight, a floating substance, a seawater solution and a seawater container; the LPFG signal demodulation part comprises an ASE broadband light source, an F-P filter, an optical splitter, a photoelectric detector, a signal conditioning circuit, an ADC acquisition module, an FPGA and the like. According to the principle that floating substances have different draught depths in seawater with different salinity, original contact type refractive index measurement is changed into non-contact type bending measurement, so that the sensitivity of seawater salinity measurement is improved; on the basis of double LPFGs, a temperature compensation sensor is provided while the bending variation is detected; a temperature sensor based on LPFG is added to realize simultaneous measurement of seawater salinity and temperature; the FPGA and the F-P filter are utilized to complete demodulation of an LPFG signal, and the problem that a spectrometer is inconvenient to carry is solved. The device is simple in structure and convenient to carry, and can effectively improve the seawater salinity, the temperature sensitivity and the measurement precision.

The invention discloses a three-dimensional positioning device for an underwater high-pressure water dirt removing nozzle which comprises a variable-length water gun, a high-pressure water nozzle fixed to the front end of a variable-length water gun barrel through a nozzle fast locking device and a high-pressure water inlet pipe connected to the rear end of the gun barrel, and further comprises an underwater sonar 3D positioning unit arranged on a gun body, wherein the gun barrel is fixed to the gun body through a water gun fast locking device. The underwater sonar 3D positioning unit comprises a sonar signal generator, a power amplifier, a sonar with one transmitting unit and three receiving units distributed along the circumference distributed at equal intervals, a signal amplifier, a distance recognition and correction module, a temperature and salinity measurement module and a warning device, all of which are in circuit connection. By means of three-dimensional positioning device for the underwater high-pressure water dirt removing nozzle, the positioning capability and the work efficiency of the underwater high-pressure dirt removing nozzle are greatly improved through a sonar 3D positioning manner, dirt removing energy consumption is reduced, the labor intensity is lowered, the problem that the work efficiency is low due to muddy water blind sight is effectively solved, and obvious advantages are achieved in the aspects of underwater dirt removing work efficiency and work accuracy.

The invention relates to a sea water temperature and salinity information time sequence prediction method based on shipborne CTD measurement data. The method comprises the following steps: collectingsea water temperature and conductivity data, and calculating salinity measurement data based on the measured conductivity information so as to obtain original temperature and salinity data; preprocessing original temperature and salinity data collected by a shipborne CTD, wherein the preprocessing process comprises interpolation, filtering and screening so as to obtain time sequence information conforming to a calculation standard; dividing the preprocessed data into time information and attribute information including temperature and salinity, and performing fuzzy rule division on the time information; acquiring a new membership function after threshold segmentation, performing sequence alignment on attribute information and time information after fuzzy segmentation to establish a new time sequence data set, and constructing the new membership data set by using the part of sequence information as a new fuzzy sequence number; designing a long-term and short-term memory neural network prediction model, setting a loss function, and training and establishing the prediction model by using the training set.

The invention provides a method for measuring salinity of salted mustard. The technical problem that the digital measurement of the salinity of the mustard in the salted salinity production and processing process cannot be realized is solved. According to the method, after the mustard dewatering, a mustard sample is weighed; then, distilled water is added for dilution; the mustard is processed into the mustard juice by a food processor; finally, the mustard juice is subjected to salinity measurement by using an electric conductivity instrument; the salinity of the mustard can be precisely controlled. The problem that the digital measurement of the salinity of the mustard cannot be realized is solved; the salinity measurement of the mustard realizes the datamation; the precision is high; the value can be accurate to ten thousandth; the problem of unstable salinity due to the mouthfeel taste relying of the salinity of mustard is solved.

The invention discloses a continuous observation system for dissolving of methane in a surface water body, relating to greenhouse gas monitoring equipment. The continuous observation system is provided with a surface water pump, filtering equipment, temperature and salinity measurement equipment, a flow controller, a water-vapor balance device, a temperature probe, a gas pump, a cold trap, a waterproof electrode, a filtering device, an off-axis integral cavity output spectrum detector, a valve and a standard gas cylinder; a water inlet of the surface water pump is arranged underwater, a water outlet of the surface water pump is connected with an inlet of the filtering equipment, an outlet of the filtering equipment is connected with the temperature and salinity measurement equipment, an outlet of the temperature and salinity measurement equipment is connected with an inlet of the flow controller, an outlet of the flow controller is connected with the balance device which is communicated with the atmosphere, an air outlet formed in the upper part of the balance device is connected with a gas inlet of the gas pump, the temperature probe is arranged in the balance device, a gas outlet of the gas pump is connected with an inlet of the cold trap, an outlet of the cold trap is connected with the waterproof electrode, an outlet of the waterproof electrode is connected with an inlet of the filtering device, an outlet of the filtering device is connected with an inlet of the detector, and an outlet of the standard gas cylinder is connected with the balance device and the detector through the valve respectively.

The invention discloses a system and method for measuring seawater salinity based on orthogonal phase-locked amplification technology. The system includes a constant temperature water tank, in which a conductivity cell, a spiral coil, an agitator and a constant temperature device are arranged, the conductivity cell, the agitator and the constant temperature device are connected with the detection control device, the detection control device is also connected with a multi-way valve, a peristaltic pump and a computer terminal. Tanks and standard seawater storage tanks, the outlet is connected to the inlet of the conductivity cell through a peristaltic pump and a spiral coil; two current electrodes and two voltage electrodes are set in the conductivity cell, and the current electrode is a composite oxide electrode loaded with nano-scale platinum; the voltage electrode It is a silver / silver chloride reference electrode; the detection control device adopts digital orthogonal lock-in amplification technology, and the lock-in module is realized by FPGA through digital programming. The method disclosed by the invention is convenient and quick to operate, has high testing efficiency and has relatively high performance index.

The invention relates to a salinity meter with a suction pump protecting device, which comprises a salinity meter main body with a suction pump and a sump and is characterized by also comprising the suction pump protecting device, wherein the upper end of the suction pump protecting device is connected with the inlet end of the suction pump, while the lower end is inserted into the sump; a tubular body in the suction pump protecting device is divided into three cavities by a valve seat and a director from the top to bottom, namely the cavity wall side above the valve seat is provided with a safety valve communicated with the external atmosphere by means of an air inlet; the cavity wall side between the valve seat and the director is provided with an air inlet hole; and a floater is arranged in the cavity under the director, a valve rod passing through the director is fixed in the axial direction of the floater, and the top of the valve rod is provided with a valve head. The valve headprevents waste liquor from entering the suction pump along with the rise of the liquor level. The salinity meter has simple process, eliminates corrosion even burning of the suction pump caused by ambient environment and improper human operation, ensures the continuity and stability of field salinity measurement, prolongs the service life and reduces the maintenance charge.

The invention discloses a device for measuring seawater salinity in a regional range. The system comprises a Beidou satellite, a land data processing chamber built on a land, a base installed on a seabed, a tower column fixedly connected to a top of the base, a wind driven generator fixedly installed at a top end of the tower column, and a bearing platform fixedly connected to a middle of the tower column. An offshore data processing chamber is built on the bearing platform. The invention relates to the technical field of seawater salinity measurement. The invention discloses the device for measuring seawater salinity in the regional range, the seawater salinity in a far-end range of the bearing platform is detected, the corresponding sea area salinity can be flexibly controlled, extendedand monitored according to the condition of a monitored sea area, the salinity of a sea area with a small range is monitored, the monitored area is expanded on the structural size of the designed andbuilt bearing platform and is adjusted according to the regional range of the sea area monitored in real time, and the application range of salinity monitoring equipment is greatly expanded.

The object of the present invention relates to a system for measuring the salinity of hydrocarbons at the bottom of an oil well, using the technique of time domain reflectometry (TDR). The system comprises an electromagnetic pulse generator, an oscilloscope for displaying and measuring the frequency, amplitude and wavelength of the signal, a signal amplifier, a computer for processing and storing the information, and a metal wire that functions as a waveguide To transmit the signal from the signal generator to the hydrocarbon to which its salinity is to be determined at the bottom of the well. The signal returns from the bottom of the well to the oscilloscope where the difference between the sent signal and the return signal is measured. This difference allows us to infer the salinity of the hydrocarbon. The guide wire is attached to the production line by means of a strap or other fastening device from the surface to the bottom of the well, where the tip of the cable is inserted into the pipe to contact the hydrocarbon and in this way detect its salinity. It is possible to use the same pipe as a waveguide to transmit the test signal to the bottom of the well. In addition, the salinity of the hydrocarbon can be determined at different points along the well.

The invention discloses a wireless monitoring network sensor circuit and applies to the field of weather forecasting. The circuit is composed of a dissolved oxygen sensor module circuit, a pH sensor module circuit, a salinity measurement circuit and a temperature sensor module circuit. Information can be transmitted to a shore base through a wireless network; the monitoring timeliness is ensured;the circuit is compact in structure; the red tide outbreak early warning and forecasting can be realized; the circuit is stable in work and good in adaptability; the working efficiency is improved; and the circuit has good anti-interference property and reliability.

The invention discloses an optical fiber detector for measuring the salinity and a measurement device using the optical fiber detector. The optical fiber detector is characterized by comprising an optical fiber probe, wherein the optical fiber probe is composed of a first optical fiber, a long-period optical fiber grating, a second optical fiber, fiber bragg gratings and a third optical fiber; one end of the first optical fiber is plated with a metal reflection membrane; the other end of the first optical fiber, an optical fiber carried with the long-period optical fiber grating, the second optical fiber, the optical fiber carried with the fiber bragg grating and the third optical fiber are connected with one another in sequence. The optical fiber detector for measuring the salinity has the advantages that the optical fiber detector is simple in whole structure and convenient to manufacture; the price of each part of the optical fiber is low and the ranges of the applicable environment temperature and environment depth are wide; the optical fiber detector is suitable for large-scale production; the measuring device using the optical fiber detector is convenient to assemble and is easy to operate by users; the measurement device can be used for accurately obtaining the salinity, the temperature and the depth of a water body in a large range in real time.

The invention discloses a tidal mangrove seedling raising irrigation system, which comprises a seedling bed, a water inlet pump, a timing switch, a water inlet pipe, a timing valve, a drainage pipe, aliquid level sensor, a circulating pool and a salinity measuring device; the seedling bed has an accommodating space with an upward opening; the water inlet pipe is connected with a water inlet of the water inlet pump, and a water outlet of the water inlet pump is connected with the seedling bed; the seedling bed is connected with the water inlet of the timing valve, and the water outlet of the timing valve is connected with the drainage pipe; the water inlet pump is electrically connected with the timing switch and the liquid level sensor, the timing valve is electrically connected with theliquid level sensor. The tidal irrigation system starts flooding irrigation automatically at regular intervals and drains automatically after carrying out flooding irrigation for a fixed time. A salinity probe of a salinity sensor can be maintained continuously in the middle of the circulating pool so that the salinity of the water can be measured stably. The irrigation system is used for seedling raising irrigation of mangrove plants.

The invention relates to an underwater section detection buoyage. The buoyage comprises a cable puller hinging ring, a temperature, salinity and pressure measuring sensor, a sensor protection cover, a buoyancy cabin, an underwater control unit, an inner oil bag, a direct current motor, an electric rotating valve, a check valve, a hydraulic motor, a rear end cover, an outer oil bag, an oil bag protection cover and a buoy watertight connector. The underwater section detection buoyage can be used for buoyancy conversion and lift control for performing temperature measurement, salinity measurement and depth measurement on sea water. The underwater section detection buoyage is connected with an ice-based buoyage by a high strength pulling cable device with seawater corrosion-resistant vulcanized joints for forming a shallow water type pull-type temperature, salinity and depth monitoring system in the Arctic Ocean. The underwater section detection buoyage is used for performing underwater temperature, salinity and depth section measurement with the measuring depth being 0-120m under the ice layer, so that the blank of being short of an observation method for 120m or shallower water in high seas internationally is filled, and the hydrological and meteorological simultaneous observation in the same region is realized; a lithium battery with ultra-large capacity is adopted for supplying power, so that the service life of the system is prolonged, and the underwater section detection buoyage can be applied to the field related to research in polar regions internationally.