30 results about "CTD" patented technology

A MEMS-based silicon CTD sensor for ocean environment is presented. The sensor components are a capacitive conductivity sensor, a gold doped silicon temperature sensor, and a multiple diapghram piezoresistive pressure sensor. The sensor elements have further been packaged to protect them from harsh marine menvironment. The sensor components showed good linear response, resolution and mechanical integrity to the harsh ocean environment.

The invention discloses a self-balancing descending type seabed base, which is characterized by comprising a seabed base and a recovery instrument floating body, wherein the seabed base comprises a base body and a plurality of layers of guide plates, the guide plates are annularly distributed on the base body at intervals, and the guide plates are connected and fixed on the base body through reinforcing ribs; a cylindrical cavity with an upward opening is formed in the upper middle portion of the seabed base, the recovery instrument floating body is installed on the cylindrical cavity formed in the upper portion of the seabed base, and a closed cabin is formed between the recovery instrument floating body and the cylindrical cavity of the seabed base. Three ocean observation instruments including ADCP, CTD and a releaser are arranged in the instrument recovery bin. Water changing holes are designed on two sides of the instrument recovery bin, and a rope disc is arranged on the lower portion. The self-balancing descending type seabed base has the functions of net disengaging prevention, silting prevention, biological attachment prevention and self-balancing vertical descending landing, the laying steps are simplified, the observation success rate is increased, and the self-balancing descending type seabed base can be used for ocean element observation of sea areas such as bays,estuary, continental shelving and continental slopes.

The invention relates to a fixed-point multi-layer marine environment profile monitoring system, which mainly comprises: (1) a buoy system, (2) signal / power supply cables, (3) a seabed base, (4) an anchor system, (5) a multi-parameter profile observation chain and (6) float balls arranged on the (5) multi-parameter profile observation chain, wherein the (5) multi-parameter profile observation chain can observe water quality parameters such as conductivity-temperature-depth (CTD), turbidity, chlorophyll and the like, the depths of different layers of the (5) multi-parameter profile observationchain are designed according to monitoring requirements, the (5) multi-parameter profile observation chain is connected to the seabed base by the cable, the buoy system (1) contains a meteorological sensor, a data acquisition and storage system, a remote communication system, an alarm and positioning system, a solar power supply system and the like, the hollow middle portion of the buoy reserves the space for transmitting the data collected by the (3) seabed base and the (5) multi-parameter profile observation chain into the data acquisition and storage system in the buoy system through the underwater signal cable and sending back to the shore station so as to complete the data display and analysis; and the system is anchored by the three-anchor system with the equilateral triangle shape and the seabed base, and can achieve the long-term continuous profile marine element monitoring.

The invention provides a device for monitoring seabed shallow sediment erosion resuspension in an internal wave environment. The device comprises a snorkeling system, an observation platform and a supporting system, the snorkeling system comprises a glass floating ball combination, a mooring rope, a subsurface buoy, a Kelvar cable and a limiting cylinder. The observation platform comprises a middle supporting rod, a stabilizing circular ring, a supporting rod, an acoustic Doppler current profiler, a sediment capturer, a circular ring with a hole, an optical backscattering turbidity meter, a battery bin, a conductivity-temperature-depth meter, a supporting plate and an acoustic Doppler velocimetry. The supporting system comprises a buffering device, a vertical supporting rod and a gravity anchor. According to the technical scheme of the invention; the device aims to directly reach the seabed to collect and obtain accurate suspended sediment concentration information on the basis of notdestroying the seabed environment. The influence of the seabed on the internal solitary wave suspended sediments is discussed; and the device is good for evaluating the suspension quantity caused by internal solitary waves and the influence on the seabed deposition process, is good for further predicting the seabed evolution, is good for accurately describing the sediment movement and improving the sediment resuspension quantity prediction level in application, and also provides a new technology and means for sediment resuspension research.

The invention discloses a coral reef ecological environment monitoring system, which comprises a data acquisition system, a laser 3D scanning system and a power supply system. The data acquisition system comprises a top floating ball, a middle floating ball, a lower floating ball, an ocean element sensor, a first self-weight anchor and a Kevlar rope; a top floating ball, a middle floating ball and a lower floating ball are uniformly fixed on the Kevlar rope from top to bottom; and a plurality of ocean element sensors are further arranged on the Kevlar rope, the CTD and the ADCP are fixed below the top floating ball, the bottom of the Kevlar rope is connected with a first self-weight anchor, the Kevlar rope and a power data transmission line are arranged in parallel, and the power data transmission line is connected with the ocean element sensor, the CTD and the ADCP. Solar energy is adopted for power supply, fixed-point long-time continuous real-time observation is achieved, weather influence is avoided, the effect is good, and efficiency is high. According to the invention, multiple sensors are integrated to carry out multi-parameter marine environment monitoring, and dynamic, continuous and real-time environment monitoring of a large sea area of a coral reef area is realized.

The invention relates to a large ocean sea channel surveying vessel which carries various high-performance specialized ocean surveying equipment systems, and comprises a manned measurement boat, an unmanned measurement boat, an autonomous unmanned underwater vehicle release and recovery system, a pull-type measurement device, a navigation type multi-element measurement system, a thermohaline depth gauge detector, an underwater fixedly-mounted acoustic device and a measurement winch device. The measurement operation deck area comprises a tail operation area and a broadside operation area, and the multi-point putting and recycling requirements of measurement equipment can be met; the underwater fixedly-mounted acoustic device is mounted at the bottom of the ship in front of 1 / 3 of the length of a midship of the ship through a bow hoisting appendage; a stabilizer adopts a retractable fin stabilizer and a passive controllable anti-rolling tank, and two types of stabilizer equipment are intelligently and automatically controlled through a combined control system; the surveying vessel is further provided with a DP-2-level dynamic positioning system, and the surveying precision, continuity and reliability in the long-period gridding surveying operation and fixed-point surveying operation process in the deep sea and the far sea can be guaranteed.

The invention relates to the technical field of fixed-point ocean observation, and particularly relates to a floating seabed base which comprises a seabed base box body and a gravity anchor. The seabed base box body is connected with the gravity anchor through a release cable, a release device is installed on a partition plate arranged in the seabed base box body, and the partition plate divides the seabed base box body into an upper box body and a lower box body. The upper box body is provided with an underwater acoustic communication machine, an ADCP, a CTD, an optional observation instrument and a floating ball; and the lower box body is provided with a cable winding device with a friction disc. In a releasing process, when the partition plate is located on an interface of the soft sediment layer and seawater, a torque generated by a release cable is larger than the maximum static friction torque of the friction disc of the cable winding device, a cable winding roller rotates, the release cable is lengthened, the seabed base box body is prevented from continuously sinking, and the releasing point soft sediment layer thickness is adapted. Technical problems that the seabed base release cable is too short, the seabed base may be buried in the soft sediment layer to be lost, and the seabed base release cable is too long and may be dragged away by a fishing net to be lost are solved, and an instrument loss rate and unit observation data cost are greatly reduced.

The invention aims at the requirements of integrated monitoring application of seawater temperature salinity and depth, overcomes the defects of various existing temperature, salinity and depth sensors, and provides a CTD sensing array based on a micro-nano optical fiber coupler SAGNAC ring. The CTD sensing array is composed of a tunable wavelength scanning light source, a tunable optical switch,n optical circulators, n-1 CTD sensors based on the micro-nano optical fiber coupler SAGNAC ring, an FBG temperature sensor, a beam combiner, a photoelectric detector, a data acquisition card, a signal processing computer and a CT electrical sensor. Multi-sensing-probe space division multiplexing cascading is achieved through the tunable optical switch, then temperature, salinity and depth integrated signal demodulation processing is achieved through the high-precision tunable light source and the array has the characteristics of being compact in structure, high in modular integration degree,high in data compatibility, low in cost, high in sensitivity and the like.

The invention discloses an umbrella rib type underwater vehicle depth and posture adjusting device which comprises a buoyancy adjusting system A, an information acquisition and control system B and abattery pack. The buoyancy adjusting system A comprises a head end adjusting subsystem and a tail end adjusting subsystem; the head end adjusting subsystem and the tail end adjusting subsystem comprise main shaft stepping motors, main gears and six groups of buoyancy adjusting units; each buoyancy adjusting unit comprises a buoyancy adjusting cabin, a push rod, a conversion cylinder, a relay shaftlimiter, a coupling type electromagnetic clutch, a branch gear and a transition gear; the information acquisition and control system B comprises a depth meter, a temperature-salinity-depth meter, aninertia measuring instrument, a displacement sensor, a processor and a control assembly. The control method comprises the steps that the underwater vehicle dives; the underwater vehicle floats upwards; and the heeling posture of the underwater vehicle is adjusted. The buoyancy state is adjusted by changing the drainage volume, the longitudinal and transverse inclination postures of the underwatervehicle are adjusted by changing the position of the buoyancy center, and the device and method are suitable for large-range depth adjustment and high-precision buoyancy compensation of the underwatervehicle.

The invention discloses a monitoring and adjusting system for a seat bottom self-elevating underwater leveling frame. The system comprises four underwater pressure sensors, a positioning GPS, a data sending unit, a temperature-salinity-depth instrument and a data processing and displaying module, the four underwater pressure sensors are close to the four hydraulic supporting legs respectively andinstalled on a rectangular frame of the leveling frame, the positioning GPS and the data sending unit are exposed out of the water surface and installed on the measuring tower, the measuring tower isfixed to the rectangular frame of the leveling frame, and the temperature-salinity-depth instrument is installed on a hopper or a trolley of the leveling frame. The data processing and displaying module comprises a computer, a data receiving unit and a data processing unit, and the data processing unit obtains the telescopic amount of the four hydraulic supporting legs through calculation. According to the leveling device, the telescopic amount of the four hydraulic supporting legs of the leveling frame can be obtained, the telescopic amount is sent to the hydraulic control system, and then height adjustment of the hydraulic supporting legs can be achieved.

The invention relates to a method for reconstructing a full-depth sound velocity profile by combining a WOA2018 model and actually measured thermohaline data. The method is characterized by comprisingthe following steps of: dividing water depth into two parts, namely a part within an effective measurement depth and a part outside the effective measurement depth, by taking effective measurement depths of XCTD and CTD actually measured thermohaline data as boundaries; within the effective measurement depth, adopting an actually measured temperature profile and an actually measured salinity profile; outside the effective measurement depth, revising the WOA2018 model outside the effective measurement depth by combining the data at the effective measurement depth, and constructing a full-depthand high-precision temperature profile and a full-depth and high-precision salinity profile; and calculating a full-depth and high-precision sound velocity profile by using the obtained full-depth and high-precision temperature profile and salinity profile. According to the method, the quality problem of the submarine topography measurement result caused by the sound velocity profile defect in the conventional deep and far sea multi-beam water depth measurement can be solved, and the reliability of the deep and far sea multi-beam submarine topography measurement result is effectively improved.

The invention relates to a sea water temperature and salt calibration data acquisition device, which comprises a thermostatic bath, a standard temperature sensor and a standard conductivity sensor, wherein a simulated sea water environment is in the thermostatic bath, a support frame is arranged in the thermostatic bath, and two or more detected CTDs are fixed on the support frame; the standard temperature sensor and the standard conductivity sensor are connected through a watertight cable and can be lowered to the position, close to a detected CTD, in the thermostatic bath, and the standard temperature sensor, the standard conductivity sensor and the detected CTD are located at the same depth. Real-time measurement of temperature and conductivity in the thermostatic bath can be realized,standard temperature and standard conductivity values are provided for experimenters, and abnormal conductivity in the experiment process can be found out at the same time. The conductivity standard value can be obtained in real time, a sea water sample does not need to be collected in an experiment, the conductivity measurement error of the detected CTD can be found in time, and the experiment process is optimized.

The invention provides a device for underwater sound velocity measurement and a use method thereof. The device comprises a sound velocity measuring device, a booster pump and a control device, the sound velocity measuring device comprises a sound velocity measuring container, and a sound wave transmitting transducer, a hydrophone, a temperature controller, a salinity indicator and a laser ranging device which are connected to the sound velocity measuring container; and the control device is connected with the sound wave transmitting transducer, the hydrophone, the temperature controller, the salinity indicator and the laser ranging device. According to the device for underwater sound velocity measurement and the use method thereof, sound velocity measurement under different water depths, different temperatures and different salinity in the ocean can be simulated through the device, the underwater sound velocity error measured in an indirect mode is corrected, and the measurement precision of CTD and other instruments is improved.

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 belongs to the technical field of ocean observation, and relates to a disposable underwater temperature-salinity-depth measuring device carried on an underwater vehicle. The invention discloses a disposable underwater temperature-salinity-depth measuring device carried on an underwater vehicle. The disposable underwater temperature-salinity-depth measuring device comprises a split shell, a front-end floater, a rear-end floater, a CTD sensor and a control panel, the lower portion of the front-end floater is connected with a bottom end cover, a split shell is arranged outside the rear-end floater, and the split shell is connected with the bottom end cover in a matched mode through a connecting mechanism. The CTD sensor is in watertight connection with the top of the front-end floater; a pressure triggering mechanism is arranged in the front-end floater; the pressure triggering structure comprises a screw rod seat, a movable screw rod and a cam screw rod; the screw seat is hermetically connected with the bottom end cover, and the bottom end cover is hermetically connected with the front-end floater in sequence to form a watertight space; the control panel is installed in the watertight space. The device is launched through an underwater vehicle, temperature-salinity-depth measurement of a water body profile is completed in the floating process, and measurement data is transmitted to the underwater vehicle; and disassembling and discarding after measurement is completed.

Aiming at the application requirements of seawater temperature, salinity and depth integrated monitoring, the invention overcomes the shortcomings of existing temperature, salinity and depth sensors, and proposes a CTD sensing array based on a micro-nano optical fiber coupler SAGNAC ring, which is scanned by a tunable wavelength. Light source, tunable optical switch, n optical circulators, n-1 CTD sensor based on micro-nano fiber coupler SAGNAC ring, FBG temperature sensor, beam combiner, photodetector, data acquisition card, signal processing computer and CT It is composed of an electrical sensor, using a tunable optical switch to realize the multi-sensing probe space division multiplexing cascade, and then realizes the temperature-salt-depth integrated signal demodulation processing through a high-precision tunable light source. It has the characteristics of strong data compatibility, low cost and high sensitivity.

The invention relates to the fields of marine environment monitoring and optical-fiber sensing technology, and particularly to a marine multi-parameter integrated monitoring system based on a micro-nano optical-fiber half coupler and a method. The monitoring system includes a tunable wavelength scanning light source, an optical-fiber isolator, a 1x4 tunable optical switch, a CTD sensor, a magnetic-field sensor, a humidity sensor ,a harmful-gas sensor, a photodetector No.1, a photodetector No.2, a photodetector No.3, a photodetector No.4, a collection card and a signal processing computer. Thesystem of the invention has the advantages of a simple structure, low costs, high sensitivity, multi-parameter integrated sensing, high integration, convenient deployment, high data compatibility andthe like, and effectively satisfies multi-parameter integrated monitoring and information processing application demand of marine environments. The system is an optical-fiber sensing system, can be convenient for integration with an existing optical-fiber hydrophone system, and then provides a real-time in-situ high-precision marine dynamic environment guarantee.

The invention discloses a turbulence signal data processing system and method for an ocean microstructure profiler. The system comprises a first branch, a second branch, a third branch, and a fourth branch, which are respectively used for receiving turbulence transverse data, turbulence longitudinal data, turbulence temperature change data, and turbulence CTD data. The data collected by the turbulence signal data processing system can meet the requirement for ocean turbulence research and analysis, turbulence transverse data, turbulence longitudinal data, turbulence temperature change data and turbulence CTD data are collected by using different branches respectively, interference caused by using the same channel to collect the data can be avoided, and the detection precision is improved. Compared with like systems and methods in the prior art, the system and the method can better cope with adverse factors such as complex environment temperature change, high humidity and high noise for turbulent motion measurement, and has better signal-to-noise ratio performance, smaller size and lower power consumption. The method and the system are widely applied to the technical field of electronic circuits.

The invention discloses a bottom self-elevating underwater leveling frame monitoring and adjustment system, which includes 4 underwater pressure sensors, a positioning GPS, a data sending unit, a temperature, salt and depth instrument, and data processing and display Module, 4 underwater pressure sensors are respectively installed on the rectangular frame of the leveling frame near the 4 hydraulic outriggers, the positioning GPS and data sending unit are exposed to the water surface, installed on the measurement tower, and the measurement tower is fixed on the leveling frame On the rectangular frame, the temperature, salt and depth instrument is installed on the hopper or trolley of the leveling frame; the data processing and display module includes a computer, a data receiving unit and a data processing unit, and the data processing unit obtains the expansion and contraction of the four hydraulic legs through calculation. The invention can obtain the stretching amount of the four hydraulic legs of the leveling frame, and send the stretching amount to the hydraulic control system to realize the height adjustment of the hydraulic legs.

The invention discloses a vertical channel navigation method of a deep sea type underwater vehicle. The method comprises the following steps: constructing a pressure intensity-depth database by using a CTD profile, inputting the pressure intensity measured by IPS of the underwater vehicle into a database for linear interpolation to obtain the IPS interpolation depth, the IPS measurement being inevitably influenced by sea waves and sensor noise; and then outputting a smoother depth based on an AKF filter. The influence of sea waves and sensor noise is weakened, and the method can be applied to a deep sea environment and is not influenced by the seawater depth. According to the scheme, temperature, salinity and pressure profiles measured by CTD are used, a seawater state equation is combined, the conversion error from pressure to depth is smaller, error accumulation does not exist, the updating frequency of navigation result output smooth data is high, navigation is carried out based on smoothed vertical speed information, and better practical application and popularization effects are achieved.

The invention provides a device for monitoring seabed shallow sediment erosion resuspension in an internal wave environment. The device comprises a snorkeling system, an observation platform and a supporting system, the snorkeling system comprises a glass floating ball combination, a mooring rope, a subsurface buoy, a Kelvar cable and a limiting cylinder. The observation platform comprises a middle supporting rod, a stabilizing circular ring, a supporting rod, an acoustic Doppler current profiler, a sediment capturer, a circular ring with a hole, an optical backscattering turbidity meter, a battery bin, a conductivity-temperature-depth meter, a supporting plate and an acoustic Doppler velocimetry. The supporting system comprises a buffering device, a vertical supporting rod and a gravity anchor. According to the technical scheme of the invention; the device aims to directly reach the seabed to collect and obtain accurate suspended sediment concentration information on the basis of notdestroying the seabed environment. The influence of the seabed on the internal solitary wave suspended sediments is discussed; and the device is good for evaluating the suspension quantity caused by internal solitary waves and the influence on the seabed deposition process, is good for further predicting the seabed evolution, is good for accurately describing the sediment movement and improving the sediment resuspension quantity prediction level in application, and also provides a new technology and means for sediment resuspension research.

The invention belongs to the field of deep-sea detection and trace element collection, and particularly relates to a deep-sea trace element automatic bottle opening clean water sampler device. A water sampling bottle fixing frame is mounted on a water sampler base, and a balance base detachably mounted on the water sampler base is arranged below the water sampling bottle fixing frame; a clamping groove is formed in a water sampling bottle fixing frame through a clamping groove fixing plate, a water sampler hanging plate is detachably connected to the clamping groove, a plurality of CTD water sampling bottles are evenly arranged on the periphery of the clamping groove in the circumferential direction, each CTD water sampling bottle is hung on the water sampling bottle fixing frame, a hydraulic cylinder is installed on a bottle body of each CTD water sampling bottle, and the output end of the hydraulic cylinder is connected with a bottle cap of the CTD water sampling bottle through a traction spring. The device can collect deep-sea clean seawater, prevents the collected deep-sea seawater from being contaminated by other elements in the collection process, is convenient to install, simple to operate and high in working efficiency, and has important significance on deep-sea trace element collection and related research in China.

The invention discloses a method for observing and correcting dissolved oxygen in a polar region. The method comprises the following steps: collecting dissolved oxygen observation data by virtue of anSBE 911Plus CTD system; and observing the data by virtue of a dissolved oxygen sensor, and carrying out processing and correction. By virtue of the replacement and backup of the dissolved oxygen sensor, the observation situation of dissolved oxygen during the polar region research is improved, and the continuity and accuracy of the observation are guaranteed.

The invention relates to a comparison and measurement device and a comparison and measurement method for deep sea subsurface buoy CTD. The device comprises a CTD connecting and fixing frame, a bearingbottom bracket, two upper fixing cross beams, two bottom fixing cross beams and six bearing vertical rods, the two upper fixing cross beams are connected to the middle of the CTD connecting and fixing frame, the upper ends of the six bearing vertical rods are perpendicularly connected with the CTD connecting and fixing frame and evenly distributed on the circumference of the CTD connecting and fixing frame, and the six bearing vertical rods are perpendicularly connected with the bearing bottom bracket. The middle of the bearing bottom bracket is connected with the two bottom fixing beams. Thecomparison and measurement method can be divided into a comparison and measurement preparation stage, a comparison and measurement stage, a comparison and measurement completion stage and a calibration coefficient calculation stage. According to the method, the SBE9 type CTD with higher precision and more accurate data is taken as a measurement standard, and the error value of the CTD of the deepsea subsurface buoy can be obtained, so that the internal calibration coefficient of the deep sea subsurface buoy is corrected, and the problem that the data accuracy is reduced after the deep sea subsurface buoy is distributed for a long time is solved.

The invention relates to the technical field of seawater measurement, and provides a temperature-salinity-depth instrument and a matching device with the temperature-salinity-depth instrument and a carrying platform. The temperature-salinity-depth instrument comprises a deceleration assembly which comprises a deceleration cabin body; the circuit assembly comprises a circuit cabin body; the floating assembly comprises a rack, and the circuit cabin body is connected with one end of the rack; the measuring probe comprises a probe body and at least one first unlocking assembly, is arranged between the deceleration cabin body and the circuit cabin body, and is used for automatically separating the deceleration cabin body from the circuit cabin body after the temperature-salinity-depth instrument enters a detection water area; and / or at least one second unlocking assembly which is arranged between the rack and the probe body and is used for automatically separating the probe body from the rack after the temperature-salinity-depth instrument enters a detection water area and automatically separating the deceleration cabin body from the circuit cabin body and the probe body from the rack after the temperature-salinity-depth instrument falls towards the detection water area and enters the detection water area. And the separation between the two connecting bodies can be realized without the operation of a worker.

The invention belongs to the field of marine science investigation, and particularly relates to a conversion cable for connecting a wet plugging interface temperature-salinity-depth instrument and a standard interface transmission cable. A wet plugging female interface and a standard male interface are respectively connected to two ends of the cable through a rubber vulcanization method, the wet plugging female interface is provided with two wire holes, the standard male interface is provided with a thin wire pin and a thick wire pin, the cable comprises two mutually insulated wires, and eachwire hole is in conduction connection with one wire pin through one wire; positioning devices are correspondingly arranged on the wet plugging female interface and the wet plugging male interface of the SBE type temperature-salinity-depth instrument of the wet plugging interface connected with the wet plugging female interface; and the wet plugging female interface is sleeved with a wet plugging interface fixing cover, and the standard male interface is sleeved with a standard interface fixing cover. According to the invention, the original transmission cable does not need to be damaged, the wet plugging transmission interface of the temperature-salinity-depth instrument can be rapidly changed into a standard transmission interface of the temperature-salinity-depth instrument, marine scientific investigation is facilitated, and the industrialization prospect is wide.

The invention belongs to the technical field of conductivity-temperature-depth meters and relates to a conductivity-temperature-depth meter convenient to recycle. The conductivity-temperature-depth meter comprises a base plate and a conductivity-temperature-depth meter body; the conductivity-temperature-depth meter body is positioned above the base plate; a fixed plate is fixedly mounted on the upper end surface of the base plate; a placement groove is formed in the upper end surface of the fixed plate; a protective cage is arranged on the right side of the conductivity-temperature-depth meter body; the protective cage comprises four uniformly distributed fixing plates and a plurality of protective fences, so that the protective cage is buckled on the outer side of the conductivity-temperature-depth meter body; springs in a compressed state push four clamping plates, the position of the conductivity-temperature-depth meter body is fixed; and the protective cage can be stably mounted on the base plate through mounting holes, and therefore, the conductivity-temperature-depth meter body can be conveniently fixed; through the plurality of protective fences, the conductivity-temperature-depth meter body can be prevented from being damaged due to collision with reefs on the seabed; screws in the mounting holes can be unscrewed and detaching, the protective cage is lifted, and the conductivity-temperature-depth meter body is taken out, so that the conductivity-temperature-depth meter body can be recovered conveniently.