396 results about "Scientific experiment" patented technology

Sound, robust methods identify the most suitable, parsimonious set of tests to use with respect to prioritized, sequential anomaly detection in a collected batch of sample data. While the focus is on detecting anomalies in network traffic flows and classifying network traffic flows into application types, the methods are also applicable to other anomaly detection and classification application settings, including detecting email spam, (e.g. credit card) fraud detection, detecting imposters, unusual event detection (for example, in images and video), host-based computer intrusion detection, detection of equipment or complex system failures, as well as of anomalous measurements in scientific experiments.

The related integrated on-line gas detector can continual detect the content of CO, CO2, SO2, NO, NO2, N2O, CH4, HCl, H2S, HF, O2, H2 and Cl2 in smoke gas, kiln gas and furnace gas, which comprises: a sampling probe, a back-blow valve, a pump, a dehydrator, a fine filter, a bypass valve, a check valve, a stable valve, a flowmeter, a gas analysis sensor, a controller, a signal display, a signal output interface, an operation button, a drier, a power, an outdoor case, a sampling pipe, a sample-gas pipe, and a back-blow pipe. This invention has wide application.

The invention discloses a microarray chip without solid walls based on LSPR (Localized Surface Plasmon Resonance) and application thereof. The substrate of the microarray chip is in a hydrophilic and hydrophobic mode and comprises a base, a plurality of hydrophilic regions and hydrophobic regions, wherein the hydrophilic regions are arranged on the base; the hydrophobic regions separate the hydrophilic regions; the surfaces of the hydrophilic regions are provided with metal nanometer material layers with local area surface plasma resonance attributes; the outer regions of the hydrophilic regions are not provided with the solid walls; the surfaces of the hydrophobic regions are provided with hydrophobic material layers. The microarray chip disclosed by the invention can be obtained by combining a peculiar affinitive molecule for detecting a substance to be detected on the substrate provided by the invention. The microarray chip disclosed by the invention has the advantages of easiness and convenience for use, low detection cost, accurate result, reusability, and the like, can be used for detecting multiple substances, such as micromolecules, heavy metal ions, proteins, bacteria, viruses, and the like, and has wide application prospect in the fields of medical health, environmental monitoring, scientific experiments, and the like.

The invention discloses a blood collecting container, and particularly relates to a container for collecting nucleic acid preserved at normal temperature. The container comprises a collecting pipe and a rubber plug, wherein the rubber plug is sealed on a pipe orifice of the collecting pipe; a protective cap is arranged outside the rubber plug; an additive is arranged inside the collecting pipe; and the additive is prepared from a blood anticoagulant and a buffer solution thereof, an antiseptic fixative, a nuclease inhibitor, a metabolic inhibitor and a cell membrane stabilizer in a mixing manner. By adopting the container, the collected sample can be kept in an initial state for 7-14 days or even longer time at normal temperature, and does not decay, so that the detection result is not affected. The collecting container can be applied to collection, storage and transportation of a blood sample in a disaster, a war or a hard area, can be applied to collection, storage and transportation of other tissues, cells and the like in a scientific experiment, and also can be applied to other clinical inspection items. By adopting the container disclosed by the invention, the storage condition after the sample is collected is reduced. Thus, the labor of a worker is reduced, and the work efficiency is improved.

The invention discloses an on-line analytical processing (OLAP) massive multidimensional data dimension storage method. Firstly, OLAP multidimensional data are divided according to dimensions, dimension hierarchical encoding is built, a high definition (HD) File dimension storage file structure is designed, only relevant dimension corresponding data needs to be accessed for aggregation calculation, and therefore retrieval of unrelated data is avoided; secondly, a B+ tree index based on the dimension hierarchical encoding is built for rapid positioning of the dimension storage data, and therefore input (I) / output (O) overhead is saved; and at last, a high-efficiency parallel query algorithm is designed, and OLAP query efficiency is further improved. Therefore, the OLAP massive multidimensional data dimension storage method which is high in efficiency, easy to use and scalable is provided for massive data analysis application for scientific experimental statistics, environmental meteorology, bioinformatics computing and the like.

The invention discloses a device for performing a microalgae culture experiment by using LED dimmable light and a method for culturing microalgae by using the device. The upper half in a box body of the device is provided with a luminescence component consisting of red, green, blue, yellow and white LEDs; the lower half in the box body is provided with a fluorescent lamp luminescence component; and the upper half is isolated from the lower half by a ventilation lightproof plate. The LEDs with the five colors are connected with a single-chip control circuit respectively and the LED luminescence is controlled by adopting a PWM (pulse width modulation) technique. The manual control and the automatic control on the continuous light intensity can be selected respectively, the light spectrum and the illumination cycle can be selected, and a full-day automatic control illumination mode for simulating sun light gradual changes can be selected. Through the contrast culture with a fluorescent lamp, the optimal LED illumination scheme aiming at different microalgae can be determined. The device provides an LED illumination environment for the scale microalgae culture. The device is also suitable for scientific experiment work such as the tissue culture, the seedling culture and the like of higher plants.

The invention discloses a laying hen forage premix containing DHA enriched in algae protein powder. The invention belongs to the technical field of forages. The laying hen forage premix is prepared with an optimal formula obtained after repeated scientific experiments. The components of the forage premix are functionally complementary, and provide a synergetic effect. According to the invention, basic nutrition requirements of laying hens during a laying period are comprehensively considered; and algae protein powder and chia seeds rich in Omega-3 fatty acids such as DHA are reinforced. With the forage premix provided by the invention, the body builds of the laying hens are improved, the body immunities of the laying hens are improved, the utilization rate of the forage can be improved, digestion and absorption of the nutrients can be promoted, and the laying performances of the laying hens can be effectively improved. Especially, the DHA content in eggs can be improved, and the cholesterol content in eggs can be reduced, such that egg qualities can be improved. Among the eggs laid by the laying hens fed with the forage premix provided by the invention, an average DHA content in every 100g of yolk reaches 380-560mg, which is 8-12 times that of common eggs.

Disclosed is a spacecraft carrying a number of pods, each containing an aircraft that has been folded to fit in the pod. Each aircraft has a vertical stabilizer and outboard wing-portions that fold around fore-and-aft axes. Each aircraft also has a fuselage that folds around a lateral axis. The spacecraft releases one or more of the pods into an atmosphere. Each of the pods is configured with an ablative heat shield and parachutes to protect its aircraft when the pod descends through the atmosphere. The pod releases its aircraft at a desired altitude or location, and the aircraft unfolds while free-falling. The aircraft then acquires and follows a flight path, and activates scientific experiments and instruments that it carries. The aircraft relays results and readings from the experiments and instruments to the spacecraft, which in turn relays the results and readings to a mission command center.

The integrated miniature spectrometer consists of two parts of beam splitting and imaging one and spectral signal acquiring and processing one, the beam splitting and imaging part consists of incident fiber, concave grating, planar reflector, base, upper casing and other elements and devices; while the spectral signal acquiring and processing part consists of photoelectronic detector array, spectral signal read-out circuit, A / D converter circuit, spectral signal processing circuit and analysis software. The present invention integrates incident fiber, concave grating, planar reflector, photoelectronic detector array, etc. and may be used widely in on-line real-time detection and analysis of scientific experiment, biochemical analysis, environment monitoring and other fields.

The invention relates to a cloud computing platform-oriented scientific workflow system and method. A customization module customizes a display layer, a workflow layer, an executive layer and a computing environment; an automatic deployment module automatically deploys the computing environment according to a computing environment abstract description of the customization module and a corresponding scientific software automatic configuration script; and an executive module accurately dispatches calculation steps of a scientific workflow and runs in the cloud computing environment. According to the system and the method, more customizable scientific workflow services can be provided for scientific research personnel; scientific workflow processes can be customized according to scientific experiment demands; computing resources in a cloud platform are rented as needed; the limitation of computing resources in a machine room of a lab is avoided; the limitation in manually installing a software tool to deploy the computing environment is avoided; it is not required to perform manual tracking and execute the calculation steps; and the system and the method are suitable for large-scale scientific data analysis tasks.

The invention provides a nano stress sensor based on a metal nano gap and a preparation method thereof. The nano stress sensor based on the metal nano gap comprises a substrate made of an insulating material and a pair of metal thin film electrodes arranged on the substrate; wires are led out from the metal thin film electrodes so as to be connected with an external measurement ammeter; a metal nano structure for forming a conductive path can be formed between the metal thin film electrodes; and the metal nano structure comprises at least one nano gap. According to the sensor disclosed by the invention, a high-frequency vibration signal can be rapidly responded and the high-frequency vibration signal is converted into an electric signal; and the nano stress sensor has the advantages of high sensitivity, fast responding speed, easiness for miniaturization and microminiaturization and high stability. The stress sensor disclosed by the invention can be applied to the fields of scientific experiments, control and management of a production process, production quality identification, engineering diagnosis and evaluation and the like.

A laser radar optical path autocollimation method and collimator are disclosed that comprise reflector, laser, signal detecting element, receiving telescope and computer. It's characterized in that it includes mirror bracket, a fixed plate is mounted on the mirror bracket, a movable plate is mounted on the fixed plate, the fixed plate is connected with the movable plate via springs, the reflector is located on the movable plate, two sets of slide blocks / micrometer mechanism and driven step motor are mounted in the mirror bracket, there are push-rods on the slide blocks which extend from the hole on top of the bracket and the fixed plate to the underside of the movable plate. The slide blocks and the push-rods are motivated upwards by the rotation of the driven step motor, the movable plate is adjusted to rotate along the X, Y axis, and the target position of the reflector is fixed at last with high accuracy. The application prospect: atmosphere scientific experiment measuring apparatus and measuring means can be used in various laser radar systems.

The invention provides a novel floating type multifunctional seaborne test platform. The novel floating type multifunctional seaborne test platform comprises a floating type platform and a matched sea mooring system, wherein the floating type platform comprises a floating body structure, a stand column, a freeboard deck, a lower deck and an upper deck, a rectangular moon pool is formed in the middle of the test platform, a derrick and an electric hoist arranged on the derrick are arranged above the moon pool, the sea mooring system comprises a navy one-side anchor machine and an anchor chain, the upper deck is provided with a deck house, a starboard of the upper deck is provided with a hydraulic slewing crane, the test platform is further provided with a flow rate and flow direction meter, a master control chamber is also formed in the deck house, and a data acquisition device, 3G wireless transmission equipment, a ballast tank control face plate and a computer are arranged in the master control chamber. The novel floating type multifunctional seaborne test platform can provide the test platform located in a natural sea area for various marine scientific experiments, can provide valuable on-site experimental data for development of various fields of oceanographic engineering, and has great promotion and popularization effects on the oceanographic engineering.

The invention relates to a suspension stability testing device and testing method used for testing suspension stability of high-density working solution solid phase granules under high temperature and high pressure. According to the invention, the suspension stability of a high-density working solution at a shaft bottom can be accurately evaluated, which provides scientific experiment references for well drilling operation. The device has the technical scheme that an O-shaped sealing ring of a container is arranged in a groove of an upper end surface of the high temperature and high pressure resistant container, the top end of an upper cover of the container is provided with an upper part needle type stop valve, and the stop valve is connected with a constant-pressure constant-speed pump; the container is wrapped with a heating sleeve outside, a side wall of the container is provided with a temperature sensor and 11 pressure transmitters distributed equidistantly and is connected with a computer; the lower part of the container is sealed with a lower cover of the container and the O-shaped sealing ring, and the lower cover of the container is provided with a lower part needle type stop valve;the container is divided into two sealed cabins by the O-shaped sealing ring; and a U-shaped base is connected with the container through a rotary shaft, and the front end of the rotary shaft is provided with a brake switch. The device can be used for accurately testing the suspension stability of the high-density working solution under a high-temperature and high-pressure environment.

The invention discloses a method for preventing shield penetration of a building compact district from inducing ground subsidence by controlling ground loss. The method includes the following steps: firstly, building a set of concept system of ground subsidence 'ground loss' caused by the shield penetration the building compact district; secondly, building mathematical models of ground loss and ground subsidence and ground loss and construction parameters by utilizing the monitoring data of a testing section; thirdly, performing back calculation on a ground loss target according to a subsidence control target of the shield penetration of the building compact district; and finally, proposing construction control parameters of the ground subsidence induced by the shield penetration of the building compact district. The method integrates theoretical analysis, scientific experiments and numerical simulation, is strong in application, wide in monitoring and measuring rage, good in reliability and high in accuracy, and achieves quantified and refined control on the ground subsidence construction parameters of the shield penetration of the building compact district.

The application provides a laboratory safety wireless monitoring method and a system thereof and belongs to the field of measuring and controlling technology and instrument and detection technology and automation equipment. The system comprises at least an indoor safety wireless monitoring node, an information aggregation and management node, at least a portable handheld terminal and a laboratory safety information management system. Each indoor safety wireless monitoring node can monitor indoor safety states (such as fire, poisonous gas, unusual sounds and the like). The portable handheld terminal can be adopted to guarantee safety of a laboratory, remind people who are responsible for safety to carry out remote check and control and start an automatic safety device corresponding to the indoor safety wireless monitoring node according to an instruction that the portable handheld terminal sends. According to the invention, all-weather online monitoring of indoor safety information can be realized, continuity and safety of scientific experiments are guaranteed; and labor intensity of laboratory administrative staff is mitigated greatly. The location of an accident and field state can be reported accurately, and losses caused by accidents can be minimized.

The invention discloses an ecological landscape floating island, comprising one or a plurality of floating modules and floating link channels; each floating module is connected with each other, and the floating module and other objects are connected through the floating link channels; a plurality of platforms with different functions are arranged on the floating module; an anchoring positioning device is arranged under the floating module. The invention has the advantages of that the invention has low elevation and strong hydrophilicity, arbitrariness of establishing platforms, multifunction (uniqueness) of utilization, freeness from conditionality of fixed natural geography, movability (self-propulsion); the invention can carry out a series of wind power, hydropower, solar power and moon power generation, seawater desalination, freshwater purification, sewage purification, environmental protection, construction of the ecological landscape on the floating island, pseudo-classic architecture and modern architecture, as well as scientific experiment place of a marine science field; the invention has the advantages of huge scale, novel technology, good integrity, strong impermeability, light deadweight, high strength, large bearing capacity and good durability.

The invention discloses a formulation of an artificial feed for cnaphalocrocis medinalis guenee, a method for preparing the same and a method for breeding the cnaphalocrocis medinalis guenee, which belongs to the technical field of insect feed and breeding. The formulation of the feed comprises the following components in portion by weight: 2 to 4 portions of casein, 0 to 4 portions of yeast powder, 1.5 to 3 portions of glucose, 0.5 to 2 portions of cane sugar, 2 to 5 portions of wheat-germ powder, 0.01 to 0.02 portion of vitamin B complex, 0.2 to 0.4 portion of vitamin C, 0.01 to 0.02 portion of vitamin E, 1 to 4 portions of agar, 0 to 2 portions of cellulose, 2 to 4 portions of rice leaf dry powder (which is prepared from rice leaves of tillering stage by drying and crushing at a temperature of 60 DEG C), 0.2 to 0.4 portion of 4M potassium hydroxide, 0.1 to 0.2 portion of sorbic acid, 0 to 0.2 portion of nipalgin, and 90 to 120 portions of water. The feed is prepared simply with low cost, and is favorable for the cnaphalocrocis medinalis guenee which has normal growth and development, thereby overcoming the difficulty that the cnaphalocrocis medinalis guenee cannot be bred for a successive generation artificially, achieving the artificial scale breeding of insects, and providing a material and a method for scientific experiments, chemical medicament screening and the production of a viral pesticide.

The invention relates to an ultra-wideband pulse-based satellite-bone high-speed data network system, which comprises a satellite-bone data subsystem, a payload subsystem and a satellite data bus. The satellite-bone data subsystem is connected with the satellite data bus. The payload subsystem includes a payload manager and a payload, and the payload manager is connected with the satellite data bus. The data transmission between the payload manager and the payload is realized based on a wireless network. Driven by the command of the satellite-bone data subsystem, the payload manager controls and manages the payload on a satellite for scientific experiment and space exploration, and is in charge of the data acquisition, data processing, data storage, integrated transmission and data management process of the payload. The communication between the payload manager and the payload is realized based on the wireless network, wherein the communication modes therebetween are composed of WBC-to-WRT mode, broadcast mode, WRT-to-WBC mode and WRT-to-WRT mode.

A learning system with augmented reality is provided. The learning system includes a cloud server recording an operation history of a learner and providing feedback messages, and a mobile device having an image-capturing module capturing an image of a substantial object. Also, the learning system comprises an object database storing a simulated object corresponding to the substantial object, an identification module identifying the image and generating image information, and a processing module which receives and analyzes the image information, obtains the simulated object from the object database according to analyzing results, and displays the simulated object on a display interface of the mobile device. The learning system allows learner to operate simulated object operation instructions on the display interface or directly operate the substantial object to control a display status of the simulated object, and the operation history of learner is transmitted to the cloud server. Learner conducts simulation scientific experiments and substantial operational trainings by operating the simulated object or the substantial object, thereby facilitating learning abstract concepts without being limited by the time and space constraints in a conventional learning system.

The invention discloses an integrated general-purpose vertical take-off and landing aircraft based on lifting and floating force. A center fuselage is positioned in the middle of the front edge of a rear tandem wing; a left fuselage and a right fuselage are respectively positioned at wingtips at two ends of the tandem wing, and stretch out forwards; two engines are respectively mounted on the inner side of the left fuselage and the inner side of the right fuselage; tail booms which extend backwards are respectively arranged at the rear end of the left fuselage and the rear end of the right fuselage, and each tail boom and the longitudinal axis of a fuselage form an included angle of 15 degrees. According to the aircraft, a twin-vertical tail layout is adopted; an elevating rudder and steering rudders are respectively arranged on a horizontal tail and vertical tails; each undercarriage is in a front three-point manner; main undercarriages are respectively positioned at the lower part of the left fuselage and the lower part of the right fuselage; the front undercarriage is positioned at the front part of the center fuselage. The aircraft disclosed by the invention has the characteristics of extensive range of application, wide flying regions and high working efficiency; the aircraft is suitable for the fields of transportation, land surveying, resource exploration, environmental monitoring, scientific experiments, aviation trainings, safety patrolling, personnel rescue, express delivery, prevention and treatment for agriculture and forestry, culture and sports, administrative affairs, and tour and sightseeing.

A method for zigbee indoor location networking design and corresponding simplification belongs to the field of network of things. The method includes determining an area with side length being 6.5-7.5 in actual application to be optimum networking space, selecting common isosceles triangle or equilateral triangle to conduct networking and obtaining a value parameter A by offset estimation. The method simplifies a research process and is favorable for raising a corresponding research model. Effective location data can be obtained under a networking plan by value relation only related to a parameter n obtained by reduction by means of the proportional relation of three points and a coordinate value. The method enables a location process to be free of interference of the parameter A and the parameter n and only needs to obtain relative function relation with the parameter n after parameter elimination and known reference point coordinate under the corresponding relation. Therefore, corresponding coordinate is calculated, and the location aim can be achieved. By means of the method, networking density and the networking plan are scientifically designed. The method provides an analysis base for proceeding of a scientific experiment and application cost.

The invention discloses an ecosystem model and biomanipulation technology based eutrophic water body remediation method. Firstly, an ECOPATH model is used to fit the energy flowing mode of the currentecosystem, when the annual production of phytoplankton or aquatic macrophyte in a water body is too high, the minimum primary production requiring for maintaining the operation of the system is takenas the baseline according to the output result of the model, the consumption of the extra primary production in the system is increased through the predation action of fish by using a method of quantitatively adding a fish consumer, and meanwhile, the top-down effect is produced to control the biomass and the community structure of a primary producer. After finishing remediation, the ECOPATH model is used to access the fish catch, the commercial fish species added in the same year are harvested according to the assessment result, so that the balance of energy of the ecosystem is maintained, the fishing catch directly takes away a large quantity of nutritive salts in the water body, and certain economic value is produced. The novel thinking for reference and the technical support are provided for the remediation method taking the scientific experiment as the method from the perspectives of ecology, quantity and energetics, and the method has a very important application value for the ecological remediation of the damaged water body.

The invention relates to a vehicle air purifier, which belongs to the technical field of air purification. The vehicle air purifier comprises a shell, an air inlet and an air outlet, wherein a fan is arranged in the shell, one end of the fan is connected with the air inlet, and the other end of the fan is connected with the air outlet through an air duct. The vehicle air purifier is characterized in that a purifying and disinfecting device is arranged and is respectively connected with the fan and the air outlet through air ducts; the purifying and disinfecting device is composed of a filter element and an ultraviolet sterilizing device, the filter element is of a hollow structure and is composed of an inner photocatalyst filter plate, a middle activated carbon filter device and an outer HEPA (High Efficiency Particulate Air) filter device, and the ultraviolet sterilizing device is arranged in a hollow inner cavity of the filter element. The vehicle air purifier relates to vehicle air purification and disinfection, and scientific experiments show that after air is adsorbed and purified by activated carbon, photocatalyst and HEPA, is sterilized and disinfected by ultraviolet rays and is adjusted by negative ions, air in a vehicle can be kept fresh, clean and sanitary. The vehicle air purifier has the characteristics of high efficiency, convenience, high cost performance, simplification of complicated things and the like.

An automatic meteorological station is composed of different sensors, data acquisition unit, pre-controller, main controller, and real-time multitask solftware. It can automatically generate electronic reports and send them to relative users.

The invention discloses a multifunctional adjustable monkey chair, comprising a chair space surrounded by a lateral plate, a front plate and a back plate and allowing an experimental animal entering inside, and an upper plate and a head fixing plate installed above the chair space, wherein a plurality of fixing grooves are installed on the inner side of the lateral plate, and a groove is opened on the inner side of the fixing groove for installing matched plug-in units; and a rotary fixed element is installed on the outer side of the lateral plate and connected with a positioning rack for adjusting the position of the positioning rack. The monkey chair can be adjusted according to experimental conditions; and is suitable for scientific experiments on primates with different ages and shapes. The inventive monkey chair has the advantages of good commonality and convenient installation.

The invention discloses a method for correcting a load jacking experiment of a marine shaft system, which comprises the following implementation steps of: placing a jack below an optimum point of the shaft system shown in a diagram; placing a dial indicator above the shaft system, wherein a measuring rod of the dial indicator is pressed on the top surface of the shaft system; starting a manual pump, and recording lifting power data of the jack until the jack is jacked to be with the data being the data of the shaft system in a total backlash of bearings; recording pressure data in a pump body as soon as the jack is descended by 0.05mm until the indication of the dial indicator is zero; organizing recorded experimental data, drawing load curve graphs of the ascending and the descending of the jack, and calculating an average value between the two curves, wherein the average value is a bearing load. According to the method disclosed by the invention, the propulsion performance of the marine shaft system and the load borne by each bearing can be more perfect through an effective scientific experiment method of the shaft system jacking, the service lives of the bearings are prolonged by more than three times, and the failure rate of a high-elastic coupling of a gear case and bearing heating is reduced to be zero.

The invention belongs to the field of scientific experiments of materials and particularly relates to a pressure application test device and test method for a reinforced concrete sample in a salt-spray environment. The test device comprises a bearing platform, a salt-spray environment cabinet, a jack and a pressure sensor, wherein a bearing reaction frame and a loaded reaction frame are arranged at two ends of the bearing platform respectively, and the salt-spray environment cabinet is arranged in the middle of the bearing platform; the jack is fixed on the bearing reaction frame, and the pressure sensor is fixed on the loaded reaction frame; the reinforced concrete sample is placed in the salt-spray environment cabinet, the salt-spray environment cabinet provides the reinforced concrete sample with a salt-spray environment required by an experiment, the jack loads the reinforced concrete sample, and the pressure sensor measures the load value borne by reinforced concrete. The test device can apply a pressure load to the reinforced concrete sample in the salt-spray environment, the load range is wide, the load value can be adjusted freely in an experiment process, little salt spray leaks in load applying and maintaining processes, test data are accurate, the data can be read at any time, and the service life is long.

The invention belongs to the field of material scientific experiments, and concretely relates to a bend test apparatus for a reinforced concrete test piece in salt-spray environment. The test apparatus comprises a bearing platform, a salt-spray environment box, a jack and a pressure sensor; two ends of the bearing platform are respectively provided with a support reaction frame and a bearing reaction frame, and the middle part of the bearing platform is provided with the salt-spray environment box; the jack is fixedly disposed on the support reaction frame, and the pressure sensor is fixedly disposed on the bearing reaction frame; the reinforced concrete test piece is put in the salt-spray environment box, and the salt-spray environment box is used to provide the salt-spray environment demanded by the test on the reinforced concrete test piece, the jack applies bending load on the reinforced concrete test piece, and the pressure sensor measures the load value born by the reinforced concrete test piece. The apparatus is capable of applying the bending load on the reinforced concrete test piece in the salt-spray environment, and is large in loading measuring range. The load value during experiment can be freely adjusted, salt-spray leakage is small in the process of applying and maintaining the load, measure data is precise, data can be read momentarily, and the service life of the apparatus is long.