41 results about "Tide gauge" patented technology

The invention relates to an apparatus and method for the in-situ real-time observation of submarine sand waves. The apparatus includes an observation system and auxiliary devices. The auxiliary devices comprise an auxiliary ship and a hoisting device; the observation system includes a gravity anchor, a fiber grating floating earth weight sensor, a Kevlar cable, an underwater acoustic releaser group, a lower floating ball bracket, a wave and tide gauge, an upper floating ball bracket, an MRU three-dimensional attitude sensor, a satellite communication machine, an imaging sonar, a solar cell anda main floating body. The principle of the apparatus and the method is characterized in that submarine pressure change caused by the migration of the submarine sand waves is observed, the time interval, elevation and wavelength data of two adjacent extreme submarine pressures are analyzed, and the migration rate of the submarine sand waves is calculated. The method includes the following steps: selection of an observation point and a deployment time, system deployment, recovery, and data processing. The apparatus and the method provide a new idea for the in-situ real-time observation of the submarine sand waves, have the characteristics of simple and easy device, long in-situ real-time measurement period and wide applicable water range, and can realize the in-situ real-time long-term observation of the migration of the submarine sand waves.

The invention relates to a wave / tidal test verification system device and application thereof. The wave / tidal test verification system device comprises a core measurement and control system and a key auxiliary mechanism, wherein the core measurement and control system comprises a power system and a measurement and control system; the key auxiliary mechanism comprises a traction auxiliary mechanism, a bearing platform auxiliary mechanism and an isolation auxiliary mechanism; and the measurement and control system is used for monitoring and controlling a system and mutually cooperated with the power system. The wave / tidal test verification system device disclosed by the invention is a novel wave and tidal integral test verification system which completes the verification tasks of a gravity acceleration sensor, a gravity acceleration meter type wave buoy, a pressure-type acoustic-type optical-type wave measuring instrument and a pressure-type acoustic-type float-type tide gauge / water level meter by simulating the movement change rule of waves / tides / water levels by dragging the bearing platform auxiliary mechanism to move at acceleration fitting to a certain change rule in a vertical direction by dint of the traction auxiliary mechanism.

The invention relates to a cross-sea elevation datum transmission method for determining our nation's territorial sea island elevation, comprising the following steps of: calculating the land elevation datum begins reckoning geopotential value by the use of the relation between the geopotential and the elevation; deriving the formula for calculating the cross-sea geopotential difference; calculating the geopotential value of one point in a sea area according to the calculation formula and marine gravitational field data, determining the elevation value of the point corresponding to the elevation value of the land elevation datum to realize the accurate transmission of cross-sea elevation datum. The inner precision and the practical accuracy of the method provided by the invention are respectively estimated and checked by using data from 33 tide gauge stations in the offshore of China and 54 tide gauge stations on Japan's coast. The result of a test shows that the method provided by the invention can be used to transmit China's elevation datum in 1985 to sea areas near the islands and convert sea area GPS geodetic height into an elevation value of the elevation system in 1985 with the precision being better than 10 cm.

The invention discloses an automatic multifunctional culvert type breakwater suitable for a high sand content sea area and a design method and a scouring and silting method thereof. The breakwater comprises a breakwater main body, a culvert, a turbine, a high pressure water pipe, a tide gauge and a numerically controlled valve. The breakwater solves the problems that internal and external water cycles of the breakwater in part of high sand content sludge sea areas in China are closed, the water quality is poor and the sediment is accumulated by means of characteristics of a tide and sediment suspension. According to theoretical derivation and numerical experimentation, it is found that the tide will form a stream of vibrating water flow with a huge flow in the culvert of the breakwater toplay an important role on water exchange in a harbor. Position of the culvert has less influence on size of the flow. The automatic multifunctional culvert type breakwater has the characteristics of being simple to construct, economical and environment-friendly, wide in applicability and the like, and improves the water quality while preventing waves so as to reduce accumulation of the sediment. In addition, the breakwater forming a circulatory system is more intelligent.

The invention relates to a buoyancy swing device adapting to change of tide levels. The buoyancy swing device comprises a swing plate, wherein the swing plate is connected to a swing plate adjusting device; the swing plate adjusting device is connected to a controller; and the controller is connected to a tide gauge. The PC of the buoyancy swing device adapting to the change of tide levels can calculate the displacement value of the swing plate required to shift according to received tide level signals, and then the displacement value is output to the swing plate adjusting device by the PLC (Programmable Logic Controller) controller, and the position of the swing plate is adjusted by the swing plate adjusting device to realize the function of the swing plate which can adapt to the change of the tide levels; and as the position of the swing plate can be adjusted according to the change of water levels, compared with a conventional buoyancy swing device, the hydrodynamic performance of the buoyancy swing device adapting to the change of the tide levels is greatly improved, the wave energy is fully converted into usable energy, and energy waste in the whole conversion process is significantly reduced.

The invention discloses a GUI based modular support vector machine tide forecasting method, which comprises the steps of S1, acquiring continuous-sequence tide level information monitored by a tide station and a tide value forecast by using a harmonic analysis method; S2, making a difference between a measured value acquired by the tide station and the tide value forecast by the harmonic analysis method, acquiring a time sequence of non-astronomical tide, carrying out data accumulation processing on the inputted tide level information and the tide value according to a grey model AGO algorithm, and enabling the processed data to act as input so as to be applied to regression forecasting of a support vector machine; S3, forecasting tide through the support vector machine according to tide forecasting time information set in the step S1; and S4, completing data recovery of a forecast result of the support vector machine through IAGO reverse accumulation processing, wherein the recovered data is used for modifying the tide forecasting value of the harmonic analysis method.

The invention discloses a tide level detection system and method based on buoy communication. The system comprises an undersea underwater unit and a buoy unit which are connected through a cable, and further comprises a shore station receiving unit. The underwater unit comprises an installation barrel installed on a cement heavy block and internally provided with a tide level instrument. The installation barrel is provided with two connection nozzles. A power source and a communicator buoy are arranged in the buoy unit. The shore station receiving unit comprises a data receiver with a receiving antenna. The method comprises the steps that a zero point reference face is selected on a shore, horizontal zero point calibration is carried out, and tide level detection is carried out. By the adoption of the buoy communication method, data collected by the tide level instrument are transmitted to the shore station receiving system through the buoy, the problem that a tide gauge well cannot be built on an island is effectively solved, and a new method is provided for island tide level detection.

The invention discloses an acoustic undersea tide gauge. The acoustic undersea tide gauge comprises an acoustic measuring unit (1) composed of a hollow column, a transducer, an emission / receiving module, a controller and a battery, an annular substrate (2), and three holding dogs (3). A transverse inner side of the annular substrate (2) is movably connected to an inner ring (5) by a first shaft (4) and is movably connected to the acoustic measuring unit (1) which is arranged vertically and is provided with the transducer on the top of the acoustic measuring unit (1) by a second shaft (6) in the inner ring (5). In the horizontal direction, the first shaft (4) and the second shaft (6) form an angle of 90 degrees. The annular substrate (2) is connected to a marker buoy (8) by a steel rope (7). The acoustic undersea tide gauge does not need a surveying vessel as an auxiliary tool in the whole measurement process and has the advantages of simple structure, lightness, flexibility, easy operation, low observation cost and high precision.

The invention relates to a dynamic network tide gauging system. The system comprises a plurality of tide stations arranged on the shore or at sea. The dynamic network tide gauging system is characterized in that the tide stations are connected with a tide gauging data processing center on the shore through a remote communication network, the tide gauging data processing center is used for analyzing and processing tide data transmitted by the plurality of tide stations. According to the invention, the tide gauging data processing center is connected with all of the tide stations through the remote communication network, thereby reaching the purpose of real time gathering, analysis and process and centralized management of the tide gauging data, and timely obtaining distribution situation of sea factors of a large range of water, mastering the environment of a sea battlefield and realizing dynamic water level monitoring of the large range of water; the system in the invention is beneficial to overall analysis and prediction of data and can carry out early warming of sea disaster effectively, thus providing essential information for port transport, coastal fishery production, tide power generation and ocean engineering and the like, so that the system in the invention plays an important role in naval militarization application and national economic construction.

The invention discloses a tide gauge system based on Beidou and an acoustic sounding technology. The tide gauge system comprises a tide gauge, a first Beidou module and a data server, wherein the tidegauge comprises an acoustic transducer, a transducer control module, a data acquisition module and a second Beidou module, and the transducer control module is connected with the acoustic transducer;the data acquisition module is connected with the transducer control module; the second Beidou module is connected with the data acquisition module; the first Beidou module is wirelessly connected tothe second Beidou module; the data server is connected with the first Beidou module. The tide gauge system can safely and reliably collect tide data of a sea fixed point tide station, the tide gaugecan be positioned and tracked and is not easily lost, the use working intensity of workers is low, the requirements of tide gauge users to collect the tidal data of the sea fixed point tide station isfully satisfied, serious economic losses for the tide gauge users can be avoided, and great convenience is brought to the tide gauge users.

The invention relates to an apparatus and method for the in-situ real-time observation of submarine sand waves. The apparatus includes an observation system and auxiliary devices. The auxiliary devices comprise an auxiliary ship and a hoisting device; the observation system includes a gravity anchor, a fiber grating floating earth weight sensor, a Kevlar cable, an underwater acoustic releaser group, a lower floating ball bracket, a wave and tide gauge, an upper floating ball bracket, an MRU three-dimensional attitude sensor, a satellite communication machine, an imaging sonar, a solar cell anda main floating body. The principle of the apparatus and the method is characterized in that submarine pressure change caused by the migration of the submarine sand waves is observed, the time interval, elevation and wavelength data of two adjacent extreme submarine pressures are analyzed, and the migration rate of the submarine sand waves is calculated. The method includes the following steps: selection of an observation point and a deployment time, system deployment, recovery, and data processing. The apparatus and the method provide a new idea for the in-situ real-time observation of the submarine sand waves, have the characteristics of simple and easy device, long in-situ real-time measurement period and wide applicable water range, and can realize the in-situ real-time long-term observation of the migration of the submarine sand waves.

The invention discloses a portable float type automatic tide gauge which comprises a filter tube, a float, a retardation filter and a central control unit. The filter tube is provided with a pluralityof magnetic control switches along the height direction thereof, and each magnetic control switch corresponds to a height position. The filter tube is provided with an opening. The float can float inthe filter tube. The float can trigger the action of each magnetic control switch. The retardation filter is arranged in the opening of the filter tube. Water flow can come into the filter tube through the retardation filter to enable the float to float. The central control unit is arranged on the filter tube, and the central control unit is connected with a number of the magnetic control switches. According to the portable float type automatic tide gauge provided by the invention, the height position of the float is reflected by the action of the magnetic control switches, so as to acquire the liquid level height in the filter tube and a tide level value; the retardation filter can filter the water flow, which can effectively weaken the interference of the kinetic energy of the water flow; and the measurement accuracy is improved.

The invention relates to a portable corrosion-proof micro-organism growth-proof tide gauge which comprises a bracket and an underwater probe; the probe is fixedly arranged on the bracket; the bracket is a structure consisting of three conical bar frames; the underwater probe comprises an underwater probe shell, a water inlet cover and a cable joint; a sensor and a circuit board are arranged in the underwater probe shell; the water inlet cover is coaxially arranged at the lower end of the underwater probe shell; a plurality of water inlet grooves are axially arranged on the outer cylindrical surface of the water inlet cover; the underwater probe shell is coaxially provided with a red copper uniform flow cover through an insulating sleeve on a water inlet nozzle arranged in the water inlet cover; and water inlets are uniformly distributed on the outer cylindrical surface and the lower bottom surface of the uniform flow cover. In the invention, the tide gauge is simple in integral structure, scientific and reasonable in bracket design, quick and firm to mount and convenient to carry; sacrificial anodes are respectively arranged on the underwater probe uniform flow cover and the water inlet cover, and the corrosion-proof effect is excellent; the uniform flow cover arranged at the water inlet nozzle is capable of guaranteeing the data acquisition precision of the sensor, simultaneously the growth of the marine micro-organism on the surface of the underwater probe is effectively avoided, and the precision of the data acquisition of the tide gauge is effectively guaranteed; and the tide gauge is simple in integral structure and scientific and reasonable in design.

The invention discloses a tide gauge winding and unwinding structure. The tide gauge winding and unwinding structure comprises a bottom frame; the upper surface of the bottom frame is provided with ariveting hole; the riveting hole is formed in the bottom frame in a penetrating manner; the middle part of the bottom frame is provided with a bottom bearing platform which closely clings to the bottom frame; the top of the bottom frame is provided with a rope; the rope is fixedly installed at the top of the bottom frame; an equipment box is arranged at the upper surface of the bottom frame and isclosely welded together with the bottom frame; the left side of the equipment box is provided with a touch screen; and the touch screen closely clings to the left side of the equipment box. The tidegauge winding and unwinding structure can rotate under the driving of a motor by virtue of a wire winding roller arranged inside the equipment box so as to wind a connecting wire of a tide gauge or drive the motor to rotate reversely, the tide gauge can be put down, and thus the effect of winding and unwinding the tide gauge is achieved; moreover, the tide gauge is wound and unwound by driving ofthe motor, the winding and unwinding speed can be maintained to be a uniform speed, and photovoltaic power generation can be realized by virtue of a solar power generation panel arranged at the top ofan upright post, and thus an energy saving effect is achieved.

The invention discloses a new energy anti-collision self-cleaning tide gauge which comprises a tide gauge well, the tide gauge well comprises a water level cavity, a tide gauge cavity and a cleaning cavity, a tide gauge mechanism is arranged in the water level cavity, a self-cleaning mechanism is arranged in the cleaning cavity, and second hinge shafts are fixedly arranged on the lower sides of the left end and the right end of the cleaning cavity. Thenew energy anti-collision self-cleaning tide gauge is simple in structure. At ordinary times, manual maintenance is not needed, natural resources can be fully utilized for power generation, no pipeline needs to be erected, tide can be detected only by erecting the device in a target sea area, detection data are transmitted back to a base station in a wireless mode, and the self-cleaning mechanism can prevent marine organisms and the like attached to the inner wall of the pipeline from affecting normal work of the floater. The anti-collision mechanism effectively protects the impeller structure and the device body which are relatively fragile, and the new energy anti-collision self-cleaning tide gauge can independently and efficientlycomplete tide inspection work on the offshore, and has a high integration degree.

The invention relates to a laser seaborne tide gauge and a tide gauging method thereof. The gauge comprises a wireless communicator, a laser sensor, a keyboard, a displayer, a mainboard circuit and a main power supply board, wherein the mainboard circuit is formed by connecting a main controller, a clock controller, a data storage device, a storage device power supply, a serial circuit and a peripheral supporting circuit; the main controller is connected with the keyboard, the displayer, the clock controller, the data storage device and the serial circuit, and the data storage device is connected with the storage device power supply; the serial circuit is connected with a data output port, the wireless communicator and the laser sensor; the main power supply board is used for supplying power supplies for the circuits and equipment, and an external storage battery and a solar panel are used for supply voltage input or an alternating-current power grid is used for supplying a power supply through AC-DC for the main power supply board. The laser seaborne tide gauge obtains change of tide level data through change of laser, and the tide gauging method is simple, high in gauging precision and wide in range. The gauge is easy and convenient to mount, is basically maintenance-free and is stable and reliable in performance.

The invention discloses a culture method of phaeocystis globosa, and relates to red-tide algae. The culture method comprises the following steps: inoculating an algae solution of non-sterile phaeocystis globose cultured to a log phase into a sterile f / 2 culture medium, inoculating algae seeds into an f / 2-containing triangular flask for culturing the algae seeds; inoculating all the algae solution into the triangular flask containing sterile f / 2 culture medium for culturing to the log phase; inoculating all the algae solution into a sterilized algae culturing cylinder containing treated seawater, adding nutrient salt: 10 mL of a first solution, 5 mL of a second solution and 1 mL of a third solution; culturing under an illumination period of 12 h / 12 h and a ventilation volume of 9 L / min, monitoring a fluorescence value in the morning and the evening, wherein a fluorescence intensity of 100 corresponds to 1000 cells / mu L; after growing one day, adding 6 L of the treated seawater and an equivalent amount of nutrient salt to the algae culturing cylinder; monitoring the fluorescence value at a wavelength of 440 / 680 nm once in the morning and the evening; adding 20 mL of the first solution to the algae culturing cylinder; and monitoring the fluorescence value in the morning and the evening until growing to a cell concentration.

The invention discloses a self-generating tide level observation device for a tide gauge well. The self-generating tide level observation device comprises a support, a filtering hole, a well wall anda current output storage system; the support is connected with the bottom of a tide gauge well, a well wall is arranged at the upper end of the support, the filtering hole is formed in the bottom of the well wall, a plurality of spiral coil sets are arranged in the well wall, magnets with floating bodies are arranged in the spiral coil sets, and the spiral coil sets and the magnets with the floating bodies are connected with the current output storage system. The tide level observation precision is improved by adding more coil permutation and combination modes; the spiral coil design increasesthe motion path of the floating bodies, amplifies the current effect, improves the sensitivity of observing voltage fluctuation, and increases the power generation capacity at the same time, so thatrelated equipment does not need to be subjected to battery replacement, and the operability and convenience of tide level observation of the tide gauge well are improved.

The invention relates to a tide gauge station vertical reference detection method using GNSS buoys, and belongs to the technical field of tide gauge station vertical reference detection. The method comprises the following steps of S1, GNSS precision level measurement, S2, GNSS buoy on-site laying, S3, GNSS static reference station erection, S4, GNSS observation time setting, S5, GNSS buoy SSH calculation, S6, tide signal SSH data filtering, S7, SSH geoid difference elimination, and S8, unification of GNSS and tide inspection station vertical standards. The high-precision GNSS height measurement buoys are used for observing sea surface height information under the WGS-84 reference ellipsoid benchmark, the three problems are avoided, the high-precision GNSS height measurement buoys are conveniently and economically arranged in a sea area near an ocean station, accumulation of benchmark displacement errors and level measurement errors of a tide station is avoided, and tide station benchmark unification is carried out in any sea area (including an offshore island reef area).

The invention discloses an automatic laser tide gauge which has the advantages of simple structure, low cost, robustness and durability for use, easiness for installation and operation and high degree of automation and observation accuracy. The automatic laser tide gauge is provided with a hollow column body (1) of which a lower end is connected with a wave absorbing water intake device (2), a laser reflection floater (3) is arranged inside the hollow column body (1), a laser ranging module (4) is arranged at an upper end of the hollow column body (1), a laser emitter head of the laser ranging module (4) is arranged in opposite to the laser reflection floater (3), an output end of the laser ranging module (4) is connected with a microprocessor, and a data transmission module is connected with the microprocessor.

The invention discloses a simulated sea wave generating device and method. The device comprises an acoustic transducer, a motion control card, a subdivision driver, a stepping motor, a pull rope position sensor and a data acquisition card, wherein the acoustic transducer is fixed on a displacement system and can complete set movement and emit sound waves under the action of the displacement system, so that a preset wave effect is generated in a tide gauge well or a small water tank; the motion control card is connected to an upper computer, and the stepping motor drives the displacement systemto move; the pull rope position sensor is connected to the displacement system and is used for acquiring displacement information of the acoustic transducer; and the pull rope position sensor and theacoustic transducer are connected to the data acquisition card, and the data acquisition card is connected to the upper computer. According to the device and the method, waves with specific flow rates and shapes are simulated in the tide gauge well by the stepping motor, so that an effect of simulating sea waves in different states is achieved.

The invention discloses an early warning release type warning tide level monitoring device and method. The warning tide level is monitored through a wet end, a dry end and a function control box whichare arranged from bottom to top; the wet end is of a hollow structure, a water inlet is formed in the bottom of the wet end, a wave absorbing pipe is arranged in the wet end, and a magnetostriction liquid level sensor is arranged in the wave absorbing pipe; the function control box is connected with the wet end through the dry end, a central control processor is arranged in the function control box, and the central control processor is connected with the magnetostriction liquid level sensor and used for conducting warning tide level monitoring according to signals output by the magnetostriction liquid level sensor. The device is simple, convenient and flexible, can be arranged at multiple positions, changes the situation that a tide gauge station is single and is disconnected with emergency response, measures the warning tide level by adopting the magnetostriction principle, and is high in anti-interference performance, high in accuracy, high in automation degree and real-time performance and widely applicable.

The invention relates to a laser seaborne tide gauge and a tide gauging method thereof. The gauge comprises a wireless communicator, a laser sensor, a keyboard, a displayer, a mainboard circuit and a main power supply board, wherein the mainboard circuit is formed by connecting a main controller, a clock controller, a data storage device, a storage device power supply, a serial circuit and a peripheral supporting circuit; the main controller is connected with the keyboard, the displayer, the clock controller, the data storage device and the serial circuit, and the data storage device is connected with the storage device power supply; the serial circuit is connected with a data output port, the wireless communicator and the laser sensor; the main power supply board is used for supplying power supplies for the circuits and equipment, and an external storage battery and a solar panel are used for supply voltage input or an alternating-current power grid is used for supplying a power supply through AC-DC for the main power supply board. The laser seaborne tide gauge obtains change of tide level data through change of laser, and the tide gauging method is simple, high in gauging precision and wide in range. The gauge is easy and convenient to mount, is basically maintenance-free and is stable and reliable in performance.

The invention relates to a wave / tidal test verification system device and application thereof. The wave / tidal test verification system device comprises a core measurement and control system and a key auxiliary mechanism, wherein the core measurement and control system comprises a power system and a measurement and control system; the key auxiliary mechanism comprises a traction auxiliary mechanism, a bearing platform auxiliary mechanism and an isolation auxiliary mechanism; and the measurement and control system is used for monitoring and controlling a system and mutually cooperated with the power system. The wave / tidal test verification system device disclosed by the invention is a novel wave and tidal integral test verification system which completes the verification tasks of a gravity acceleration sensor, a gravity acceleration meter type wave buoy, a pressure-type acoustic-type optical-type wave measuring instrument and a pressure-type acoustic-type float-type tide gauge / water level meter by simulating the movement change rule of waves / tides / water levels by dragging the bearing platform auxiliary mechanism to move at acceleration fitting to a certain change rule in a vertical direction by dint of the traction auxiliary mechanism.

The invention relates to a vertical reference detection method of a tide gauge station by using a GNSS buoy, and belongs to the technical field of vertical reference detection of a tide gauge station. The present invention includes the following steps: S1: GNSS precision level measurement, S2: on-site deployment of GNSS buoys, S3: erection of GNSS static reference stations, S4: setting of GNSS observation time, S5: calculation of GNSS buoy SSH, S6 : Data filtering of tide signal SSH, S7: Elimination of SSH geoid difference, S8: Unification of GNSS and vertical datum of tide gauge station. The present invention uses high-precision GNSS altimetry buoys to observe the sea surface height information under the WGS-84 reference ellipsoid datum, avoids the above three problems, conveniently and economically deploys in sea areas near marine stations, and avoids reference displacement errors and levels of tide gauge stations Measurement errors are accumulated, and tide gauge station benchmarks are unified in any sea area (including) remote sea islands and reefs.

The invention discloses a GUI based modular support vector machine tide forecasting method, which comprises the steps of S1, acquiring continuous-sequence tide level information monitored by a tide station and a tide value forecast by using a harmonic analysis method; S2, making a difference between a measured value acquired by the tide station and the tide value forecast by the harmonic analysis method, acquiring a time sequence of non-astronomical tide, carrying out data accumulation processing on the inputted tide level information and the tide value according to a grey model AGO algorithm, and enabling the processed data to act as input so as to be applied to regression forecasting of a support vector machine; S3, forecasting tide through the support vector machine according to tide forecasting time information set in the step S1; and S4, completing data recovery of a forecast result of the support vector machine through IAGO reverse accumulation processing, wherein the recovered data is used for modifying the tide forecasting value of the harmonic analysis method.

The invention discloses a sea precision positioning method based on elevation constraints. Based on the instantaneous sea surface geodetic data obtained from the water level data observed by the tide gauge station, the distance between the antenna phase center of the GNSS receiver and the instantaneous sea surface is calculated to generate The prior geodetic height data of the GNSS antenna phase center, and the prior geodetic height data are used to solve the constraints, so as to improve the positioning accuracy of the sea elevation direction. Compared with the conventional GNSS positioning algorithm, the method of the invention adds an elevation constraint condition, which can not only effectively improve the calculation accuracy of the elevation direction, but also significantly shorten the convergence time of the elevation direction.

Some geographies have tide ranges above 15 yards, but most do not. The wider the tide range, the more hydroelectric power can be generated per cycle of low tide to high tide and then high tide to low tide, using a tidal barrage. Methods of raising the high tide above the measured level to fill the storage ponds to an even higher level and a method to empty the storage ponds to a lower than low tide level, provide means to expand the tide range significantly, enabling many more planet geographies to have economically feasible hydroelectric power.

The invention relates to an anti-lost device for marine equipment, which comprises a hydrostatic pressure releaser, a lifesaving floating cable with a shell and a floating ball releasing assembly, thehydrostatic pressure releaser is connected with the marine equipment, and the floating ball releasing assembly is connected with the hydrostatic pressure releaser. When the marine equipment falls into water, the hydrostatic pressure releaser is triggered by water pressure, the release rod is released, the release rod is separated from the hydrostatic pressure releaser, namely, the floating ball release assembly is separated from the hydrostatic pressure releaser, a fixed box body of the floating ball release assembly is immersed into water, and the water-soluble trigger ring is dissolved in water; the first spring rebounds instantaneously from the stretching state, the licker-in punctures the sealing film, carbon dioxide in the carbon dioxide gas cylinder is released, the floating ball air bag is inflated, the buoyancy of the floating ball air bag is increased, then the floating ball air bag floats out of the water surface, a diver is helped to find lost ocean equipment rapidly according to the floating ball air bag floating on the sea surface, and finally the positioning purpose is achieved. Therefore, the problems of marine equipment instrument loss and tide gauge recovery are solved.