526results about "Fishing nets" patented technology

A control system for a towed object (1, 6; 20; 30; 50) in or on a body of water comprise one or more towing members (3) extending between the object (1) and a towing vessel (2). One or more ballast members (4) are movably connected to a respective one of said one or more towing members (3) and controllably movable at least a distance along its respective towing member. The towed object (1) may be controlled by moving one or more ballast members (4) on a towing member (3) in order to control the catenary (c) of a towing member (3). Individual ballast members (4) may be manipulated individually in order to correct, preserve or otherwise change the geometry of a trawl.

A seine net position measurement system utilizes a plurality of sensor modules coupled to the seine net to determine the seine net position by recovering seine net position data, such as depth data, upon retraction of the seine net to the boat. The sensor modules may be configured proximal to the bottom of the net or the leadline. A depth profile of the net, as well as a rate of sinking of the net may be determined from the position data. The sensor modules have a sensor wireless signal transceiver that transmits a wireless signal to a wireless signal transceiver that sends the data to a computer for processing. The computer may be on the boat or part of a cloud computing system. This system is economical and enable a large number of sensor modules to be used to provide better accuracy of the net position.

The invention provides a three-dimensional multi-dimensional oceanic nekton monitoring method based on artificial intelligence, and relates to the technical field of oceanic nekton monitoring, and the method comprises the steps: deploying a temperature-salinity-depth section plotter and an acoustic Doppler flow velocity section plotter, collecting data, configuring an environment parameter data set, obtaining a three-dimensional environment parameter data set, and obtaining a three-dimensional environment parameter data set; and a multi-dimensional environment parameter database is generated. Various ocean fishery resource investigation means are fused, an advanced artificial intelligence method is applied, three-dimensional multi-dimensional dynamic monitoring of the ocean swimming animals is achieved, on one hand, the number composition and space-time distribution of the ocean swimming animals, especially the vertical distribution characteristics can be monitored, the population dynamics of the ocean swimming animals and the relation between the population dynamics and environmental factors can be revealed, and on the other hand, the population dynamics of the ocean swimming animals can be monitored. By monitoring the swimming animals, basic data can be provided for population resource evaluation, and the method serves formulation of fishing quota of ocean economic swimming animals, delimitation of ocean protection areas and the like.

The invention discloses a net trap fishing device, which is characterized in that a net trap assembly is provided with a fish luring assembly used for luring fishes to enter a trapping space and a visiting assembly used for observing the gathering situation of the fishes inside the trapping space and around the trapping space, so that a low-efficiency fishing mode of a fishing rod, a fishing line and a fishing hook is abandoned; an open net trap is used, a visual fish attracting tool is arranged to attract fish to enter a net trap channel, then the net trap channel is visually closed to trap the fish, the net trap is further lifted to guide the fish to rise to a platform face along with the net trap channel, and then a hand dip net is adopted to dip the fish. Visual fishing and efficient net trap fishing scenes are realized.

The invention builds on the previous inventions of one of the inventors herein and includes a group of habitats connected to online databases and programs, where data from the habitats is used to update the databases and programs about the best conditions for the creatures, plants, and possibly other lifeforms inside the habitats. The invention also includes systems for helping students and others to learn, by examining the actions and well-being of the lifeforms inside a habitat, and writing research notes about those lifeforms. The invention also includes methods and systems by which research notes about a certain species, from many students or other observers, can be examined with text analysis tools, which will locate words or phrases that are common, and other information, within the research notes. This will help to discover the optimal ranges for measured parameters like temperature and Ph for the species inside the container.

A method of controlling position of a trawl net is provided. The method may comprise: receiving, by a processor, a control input, wherein the control input comprises: (i) a selection of one of a plurality of position control modes, and (ii) a position control setpoint for the trawl net; receiving, by the processor, sensor data indicating a sensed position of the trawl net; generating, by the processor, a first trawl position control output based on the control input and the sensor data; determining, by the processor, a rate of change of bathymetry along a travel path of the trawl net; and in response to the rate of change of bathymetry meeting a threshold condition, generating a second trawl position control output by changing the one of the plurality of position control modes to another of the plurality of position control modes.

The utility model discloses a net trap fishing device, which is characterized in that a net trap assembly is provided with a fish luring assembly used for luring fishes to enter a trapping space and a viewing assembly used for observing the gathering situation of the fishes inside the trapping space and around the trapping space, so that the net trap fishing device abandons a low-efficiency fishing mode of a fishing rod, a fishing line and a fishing hook; according to the utility model, an open net trap is used, a visual fish attracting tool is arranged to attract a fish to enter a net trap channel, the net trap channel is closed visually to trap the fish, the net trap is further lifted to guide the fish to rise to a platform surface along with the net trap channel, and a hand dip net is adopted to dip the fish. Visual fishing and efficient net trap fishing scenes are realized.

A method of controlling position of a trawl net is provided. The method may comprise: receiving, by a processor, a control input, wherein the control input comprises: (i) a selection of one of a plurality of position control modes, and (ii) a position control setpoint for the trawl net; receiving, by the processor, sensor data indicating a sensed position of the trawl net; and generating, by the processor, a trawl position control output based on the control input, the sensor data and predicted trawl net position data. The predicted trawl net position data may be generated by: defining, by the processor, a plurality of parameters; receiving, by the processor, input data comprising vessel speed data, tow line payout data, and a candidate drag coefficient value for the trawl net; and determining, by the processor, a tow angle based on the plurality of parameters and the input data.

The invention discloses a graded fishing device for freshwater snails, and belongs to the technical field of snail fishing equipment. The device comprises a collecting basket, a connecting piece and a handle, the collecting basket comprises a plurality of arc-shaped elastic pieces, two end discs and a containing cavity defined by the arc-shaped elastic pieces, the two ends of each arc-shaped elastic piece are connected with the end discs through bearings respectively, and the distance between every two adjacent arc-shaped elastic pieces ranges from 10 mm to 25 mm; two ends of the connecting piece are respectively connected with the end part disc and the middle part is connected with the handle. The gap between every two adjacent arc-shaped elastic pieces directly faces the snails to press down or roll, the snails directly enter the containing cavity to be collected in a centralized mode after the gaps are opened, and the snails do not need to be frequently stooped to be picked up from the ground. In addition, adaptability can be amplified by increasing the number of the arc-shaped elastic pieces and prolonging the length of the arc-shaped elastic pieces, or a plurality of collecting baskets can be used at the same time by adding an adjusting support. The device is low in manufacturing cost, easy to assemble and low in failure rate, additional screening operation is not needed, and the working efficiency is improved.

The invention relates to the technical field of biological sampling netting gears. A stratified sampling net comprises a trawl net frame and a netting assembly, the netting assembly comprises sub-netting bodies which are sequentially arranged from top to bottom, and the lower line of the upper sub-netting body in every two adjacent sub-netting bodies is fixedly connected with the upper line of the upper sub-netting body; the trawl frame comprises a main body frame, the main body frame comprises lateral slide rails, the lateral slide rails comprise a front side slide rail and a rear side slide rail which are arranged front and back, and the rear side slide rail is longitudinally and slidably connected with the sub-netting side ropes; the netting opening and closing control mechanism comprises a sliding transverse rod, an elastic telescopic assembly and an unlocking and releasing assembly, wherein the sliding transverse rod is longitudinally connected with the front side sliding rail in a sliding manner; the upper line of the uppermost sub-netting is connected with a sliding cross rod; the lower line of the sub-netting located at the lowermost part is connected with the other sliding cross rod; and the joints of the upper lines and the lower lines of the adjacent sub-nettings are connected with the same sliding cross rod. According to the invention, the requirement of stratified sampling is met.

The invention relates to the technical field of aquaculture, in particular to a control method, system and equipment of a pond trawl fishing device and a medium. The method comprises the following steps: determining whether to trigger a highest priority interrupt signal by adopting a threshold judgment method based on an actually measured tension value obtained in real time; when the highest priority interrupt signal is not triggered, position information of a pond obstacle and a net floating line is identified and obtained based on image data, obtained in real time, of the far end of the trawl, the collision risk is pre-judged, and whether a dynamic obstacle avoidance strategy is executed or not is determined based on the pre-judgment result; the actual trawl speed and the actual driving tension are calculated based on trawl power data obtained in real time, and the optimized trawl speed is determined by adopting a fuzzy control strategy and executed. By designing feedback control logic of dynamic resistance in the trawl process, the adaptability to complex pond fishing working conditions is improved, and dynamic balance of equipment safety and fishing efficiency and intelligent upgrading of pond trawl fishing operation are achieved.

To provide underwater cleaning equipment enabling reduction of work load of cleaning of a cleaning target.SOLUTION: Underwater cleaning equipment according to the embodiment comprises: a housing which includes a target facing surface facing a cleaning target during cleaning; a first thruster provided in the housing and generating thrust in a normal line direction of the target facing surface; a cleaning brush rotatably provided in the housing and cleaning the cleaning target; four wheels rotatably provided in the housing; and a travel driving portion which drives the wheels and causes the underwater cleaning equipment to travel. Each of the wheels includes a plurality of projections which can be inserted in a hole of the cleaning target provided in the outer peripheral surface of the wheels.SELECTED DRAWING: Figure 2

The invention relates to the field of euphausia superba fishing boat design and manufacture, in particular to an euphausia superba boat truss automatic folding and unfolding system which comprises a truss, a driving device, a hydraulic system and an intelligent control system. Rapid unfolding and retracting of the truss are achieved through equipment such as the rotary truss, the thrust oil cylinder and the steel wire rope winch, flexible operation of a ship under the complex sea condition is facilitated, and the fishing efficiency is improved; the automation degree is high, the difficulty and complexity of manual operation are reduced, and the long-term operation cost is reduced. The intelligent control system can monitor the environment condition and the state of the truss in real time, it is guaranteed that unfolding or retracting operation is not executed under the unsuitable condition, and therefore safe operation of equipment and safety of personnel are guaranteed.

To provide a bottom trawl system which operates by fixing a small number of floats to a towing rope, releasing the rope with the float from a fishing boat and tying it to the net, making it slightly longer than a straight line, and the angle of elevation between the vector direction, the horizontal line and the rope diagonally upward forward is preferably between about 65 degrees and about 85 degrees, measuring the tension with a constant load torque meter on the side of the fishing boat, keeping the longitudinal force below a certain level, reeling it in and shrinking it, sinking the float, and raising the net opening of the bottom trawl to prevent the net bottom from separating from the seabed; the towing rope being automatically driven by a motor and a driver; to deal with the case of entering a deep fishing ground by letting out from the ram and reducing the tension; regarding the processing of the net, an additional lowering operation being performed when the eaves net connected in front of the head rope is hauled up; by summarizing these technologies, to make it possible to prevent fishes from escaping from the net mouth and automatically release the towing rope when the water depth increases; conversely, when the water depth becomes shallower, to make it possible to provide a bottom trawl fishing gear that retracts and adjusts the rope, lowering the float attached to the towing rope and raising the net mouth, so that the net mouth does not separate from the seabed.SELECTED DRAWING: Figure 1

The utility model relates to a wind-fishing fusion supporting foundation, a wind generating set and a wind-fishing system, the wind-fishing fusion supporting foundation comprises a support body, the whole support body is a hollow frame, the support body is provided with a first end and a second end in the height direction of the support body, the first end is used for supporting a tower, and the second end is used for being connected with a seabed; the protective net is arranged on the support body and connected with the support body, a fish cabin is defined by the protective net and the support body, and a plurality of one-way fish inlets communicated with the fish cabin are formed in the protective net; the fish luring device is arranged in the fish cabin. According to the wind-fish fusion supporting foundation, the wind generating set and the wind-fish system, combination of offshore wind power and a marine ranch is facilitated.

The invention relates to the technical field of aquatic product fishing tools, in particular to an automatic lifting intelligent shrimp catching cage which comprises an equipment body, an upper computer and a lower computer. The equipment body comprises a shrimp catching cage, a floating ring and an equipment box, a plurality of shrimp inlets are formed in the front side and the rear side of the shrimp catching cage, the left side is rotationally connected with a shrimp outlet door, a pneumatic rod is installed at the top end, the output end of the pneumatic rod is connected with the shrimp outlet door through a connecting rod, and two air pipes b are arranged on the outer side; according to the scheme, the air bag, the pneumatic rod and the related air pipe are arranged in the shrimp catching cage, and equipment such as the air pump and the air distributor is combined, so that automatic lifting of the shrimp catching cage and automatic opening and closing of the shrimp outlet door are achieved; when the cage is placed, the air bag is free of air, and the shrimp catching cage sinks by gravity; when the cage is collected, the air pump conveys air to enable the air bag to expand to drive the shrimp catching cage to float upwards, and then the air channel is controlled to enable the pneumatic rod to open the shrimp outlet door to take shrimps. Therefore, the manual operation links are greatly reduced, the labor intensity is reduced, and the shrimp catching efficiency is improved.

The invention relates to a fishery fishing system with daily output of 600 tons, which comprises a zero-buoyancy hollow hose, a netting gear module, a pumping module, a power module and a control module, and is characterized in that the zero-buoyancy hollow hose is mounted on the netting gear module, and the netting gear module comprises a net opening, a net body and a net bag; the control module is in control connection with the power module and the pumping module, the power module is connected with the pumping module, the power module is used for providing power for the pumping module, and the control module is used for adjusting various parameters of the pumping module; one end of the zero-buoyancy hollow hose is connected with a pump suction module on the ship, the other end of the zero-buoyancy hollow hose penetrates through the net body and extends into a net bag at the tail end of the net body, a closed channel connected to the ship from the tail end of the net bag is established, and fish and shrimp catches are conveyed into a catches collecting cabin on the ship from the net bag at the tail end of the net body through suction force generated by the pump suction module. The fishing efficiency of the continuous pumping fishing system can be effectively ensured and improved.

The utility model discloses a marine ranch fishing device which comprises a movable platform, the movable platform is annular, the upper surface of the movable platform is fixedly connected with a plurality of connecting plates, and the connecting plates are annularly and evenly distributed on the upper surface of the movable platform. A plurality of connecting plates are arranged on the movable platform in an annular shape, winding rollers are rotatably arranged on the surfaces of one sides of the connecting plates respectively, pull wires are fixedly connected to the surfaces of the winding rollers respectively, and the pull wires penetrate through the movable platform to be fixedly connected with the same fishing net. A rotatable winding roller is arranged on the connecting plate, so that the winding roller is controlled to drive the pull wire to be tightened so as to drive the fishing net to ascend, the fishing net is located at the bottom of the moving platform, synchronous ascending and descending of the fishing net cage are conveniently controlled, and meanwhile the fishing net cage is suitable for fishing operation at different depths.

The utility model relates to the technical field of unmanned aerial vehicles, and discloses a portable fishing unmanned aerial vehicle which comprises an unmanned aerial vehicle main body, a net casting mechanism and an auxiliary mechanism, four groups of mounting circular grooves are formed in the unmanned aerial vehicle main body around the axis center at equal intervals, and machine arms are fixedly mounted in the four groups of mounting circular grooves in a matched mode; rotating assemblies are fixedly installed at the ends, away from the unmanned aerial vehicle body, of the vehicle arms, wings are connected to the top ends of the output ends of the rotating assemblies in a matched mode, a base is fixedly connected to the axis center of the bottom of the unmanned aerial vehicle body, and a net casting mechanism and an auxiliary mechanism are sequentially arranged at the bottom of the base from top to bottom; the net casting mechanism comprises a rotating motor clamping sleeve and a clamping groove. Through cooperative use of the unmanned aerial vehicle body, the net casting mechanism and the auxiliary mechanism, the rotating motor rotates to release a fishing net and uniformly unfold the fishing net to cover a large-area water area, fishing can be achieved without manual launching, the fishing efficiency is improved, and the fishing risk and labor intensity are reduced.

The utility model provides a deep sea net cage grouper delivery promoting device which comprises a machine frame, a floating block and a net cage, a moving mechanism is arranged at the bottom of the machine frame, the bottom of the machine frame is connected with a supporting plate, wire winding mechanisms are arranged at the two ends of the supporting plate respectively, the wire winding mechanisms are connected with a fishing net bag through pull ropes, a discharge pipe is arranged on the side face of the bottom of the fishing net bag, and a valve is arranged on the discharge pipe. A fixed supporting frame is arranged on the top surface of the floating block, a guide groove is formed in the top of the fixed supporting frame, a net cover is arranged on the top of the guide groove, a first pressing plate is connected to the inner wall of the fixed supporting frame through a first electric push rod, a horizontal plate is connected to the top of the supporting frame and slidably connected with a movable supporting frame, and a second pressing plate is connected to the inner wall of the movable supporting frame through a second electric push rod. According to the grouper fishing device, the fishing net bag is driven by the line winding mechanism to fish groupers, the working efficiency is improved, the two ends of the groupers are fixed through the first pressing plate and the second pressing plate, the groupers are prevented from jumping in the process of injecting the delivery promoting medicine, the amount of the injected medicine is guaranteed, and the delivery promoting effect is improved.

The utility model provides a novel freshwater fish catching netting gear which comprises a freshwater fish culture pond, a vertical main beam is placed on the left side wall inside the freshwater fish culture pond, a main beam top beam is embedded between two plates at the top end of the vertical main beam, and a main beam bottom plate is fixed below the vertical main beam. A trapezoid reinforcing frame and a reinforcing triangular side plate are welded between the vertical main beam and the main beam bottom plate, a cylinder body mounting base is fixed to an upper shaft sleeve at the center end of the main beam bottom plate, and through cooperation of a net frame fishing lifting hydraulic cylinder and a fishing net frame left-right moving hydraulic cylinder, lifting and left-right moving of the freshwater fish fishing net frame can be achieved; the fishing operation is accurately carried out in the culture pond, and the fishing efficiency is greatly improved. The trapezoidal reinforcing frame and the reinforcing triangular side plates are welded between the vertical main beam and the main beam bottom plate, the structural strength and stability of the whole fishing net are improved, it is guaranteed that the fishing net can bear certain pressure and tension in the fishing process, and the risk of equipment damage is reduced.

According to the technical scheme, the fishing net with the adjustable mesh comprises a frame body, sliding grooves are formed in the periphery of the frame body in a penetrating mode, mesh wires are arranged in the sliding grooves in a sliding mode, and two clamping plates rotating along the X axis and the Y axis respectively are rotationally arranged on the two corners of the frame body. Two fixing plates abutting against one sides of the two clamping plates respectively are fixed to other corners of the frame body, telescopic rods are arranged on the fixing plates, pressure springs are wound around the telescopic rods, and limiting plates abutting against the other sides of the clamping plates are arranged at the ends of the telescopic rods. According to the network cable fixing device, the size of a network cable is changed by changing the distance between every two network cables through sliding of the network cables in the sliding grooves, meanwhile, the positioned network cables are gradually pressed and fixed through rotation of the clamping plates, and after all the network cables are pressed and fixed, the telescopic rods drive the limiting plates to move so that one sides of the clamping plates can move to abut against the fixing plates; after the limiting plate is loosened, the limiting plate is driven by resilience force of the pressure spring to abut against the other side of the clamping plate.

Net buoy (10) for fishing gear, comprising a buoy body (12) made of plastic which is equipped with a fastening ear (14), where the buoy body (12) is internally limited in a first chamber in the form of a buoyancy chamber (16) which ensures the buoyancy of the net buoy (10) and a second chamber in the form of a storage chamber (18). The first buoyancy chamber (16) encloses the second storage chamber (18) and the second storage chamber (18) is air-filled and has an internal, open elongated shape with side wall(s) (24) and a bottom (26) as a boundary to the surrounding first buoyancy chamber (16), where the second storage chamber (18) extends from an opening (28) on the outside of the buoy body (12) and into the buoy body (12). The opening (28) of the second storage chamber (18) can be closed and the second storage chamber (18) is set up to receive an AIS tracking unit (20).

The invention is a hose crane for a wellboat, comprising a crane arm (130) rotatable at least in the vertical plane on a rotatable swivel base (100), at least one rail (130) along the crane arm (130) for pulleys (140) distributed along the guide rail (132). The pulleys (140) suspend hose brackets (160) distributed along a suction hose (150). The suction hose (150) is arranged to extend from a wellboat's (105) inlet (107) and out to a suction nozzle (152). The suction hose (150) comprises an elongated, flexible inner hose portion (150i) extending from a crane foundation (102) to an elongated, central hose section (150m) with evenly spaced hose brackets (160) which are held underthe pulleys (140) freely movable in the longitudinal direction of the crane arm (130), and an outer elongated flexible section (150y) with a suction nozzle (152) held in a lifting wire (172) near an outer end of the crane arm (130).

The invention discloses an automatic fishing device, which belongs to the technical field of fishing devices, and specifically relates to a fishing device composed of a fishing rod, a fishing line, a reel, a pressure trigger device, a bait device, a mesh fishing device, a counterweight, etc. The middle position of the mesh fishing device (a mesh with an inflatable ring) is fixed on a lower fishing line at a certain length away from the bait device, and the inflatable ring is provided with a plurality of inflatable valves, each of which is connected to an upper parachute line of the mesh fishing device, and the other end of the upper parachute line is connected to a pressure trigger device. When the pressure reaches a threshold value and the fishing line is separated, the upper parachute line is tightened to open the valve, and the inflatable ring becomes soft and is pulled up and tightened, and at the same time, the mesh fixed on the inflatable ring (in the shape of a net bag in the water) is pulled up and gathered, and finally the fish is wrapped in the net or pierced and hung on the net to be captured.

To provide a knitting needle capable of improving durability, being easily manufactured, and increasing holding property during use and a manufacturing method of the knitting needle.SOLUTION: A knitting needle 1 of the present invention comprises: a first side plate part 2 and a second side plate part 3, which are connected each other at tips thereof and disposed to face each other; a yarn guiding body plate part 4 that is vertically connected to the first side plate part 2 and the second side plate part 3 and allows a yarn to be wound therearound; yarn storage spaces 7, 7 consisting of the yarn guiding body plate part 4 and the first side plate part 2 and the second side plate part 3 on front and rear sides of the yarn guiding body plate part 4. The knitting needle is integrally formed of aluminum alloy and has Ra 1.0 or less of surface roughness at each part and corner parts constituting each part have curved surface.SELECTED DRAWING: Figure 1

The disclosure concerns a fish farming enclosure (2). The enclosure (2) defines an internal volume (4) and comprises a bottom (8), a side wall arrangement (10), a water inlet arrangement (12) for admitting water into the internal volume (4) arranged at the side wall arrangement (10), and a water outlet arrangement (14) for outflow of water from the internal volume (4) arranged centrally of the side wall arrangement (10). The water outlet arrangement (14) comprises an elongated conduit member (26). A sludge collecting member (36) extends along a radial direction (R) beyond the elongated conduit member (26). The sludge collecting member (36) is provided with a through opening (38) such that a water passage is formed through the sludge collecting member (36). The water passage forms part of the water outlet arrangement (14).

[Problem] The present invention makes it possible to maintain the original function of a marine material when used in the state of being submerged in seawater or freshwater and also when stored or stocked in air before use, and also prevent marine pollution after use. [Solution] A constituent element of the marine material, which is used in the state of being at least partially submerged in seawater or freshwater, is made of a resin containing polylactic acid (PLA) and polybutylene adipate terephthalate (PBAT). As a result, when the constituent element is used in the state of being at least partially submerged in seawater or freshwater, and also when stored or stocked in air before use, hydrolysis in the constituent element is suppressed, while when it has landed on the seabed or riverbed after use, hydrolysis is promoted.

A synthetic rope or cable having a supportive core (1) contained within an internal cavity of a hollow braided synthetic strength member (5), the supportive core (1) shaped to adapt to the internal cavity of the hollow braided synthetic strength member (5), the supportive core (1) sheathed within a flow shield (4); the hollow braided synthetic strength member (5) formed about the combination of the supportive core and the flow shield that sheaths the core; the flow shield formed of the braid strands and being a hollow braided construction; and the hollow synthetic strength member formed of the braided braid strands, characterized in that each braid strand forming a braided flow shield is formed of at least two yarns.

The utility model belongs to the technical field of weighing devices, and particularly relates to a weighing connector which comprises an installation rod, a sliding hole is formed in the right end of the installation rod, and a square groove is formed in the left end of the sliding hole. When in use, the two ends of the mounting rod can be respectively connected with the dip net head and the dip net rod through the screw hole I and the screw rod I, and the dip net is vertically placed after fish is fished out of water through the dip net, so that the fish in the dip net head pulls the dip net head and the sliding column to descend, and the dip net head and the sliding column slide down. At the moment, a user can observe the scales displayed on the sliding column to judge the weight of the fish catch, so that the fish catch is weighed while being caught, the functionality of the dip net is effectively improved, the fishing experience is enriched, practicability is high, popularization is easy, and meanwhile when the device is used for a long time, the elasticity of the spring changes, and the fishing effect is good. The fine adjustment roller can be rotated to enable the stretching plate to move leftwards to stretch the spring, so that the spring stretching force is increased, the weight measurement accuracy is ensured, and the service life of the device is effectively prolonged.