33results about How to "Cultivate innovation ability" patented technology

An electronic experiment report automatic generating, intelligent correcting, storing and downloading system comprises a student operation subsystem, a teacher operation subsystem and a project principal operation subsystem; each subsystem comprises a plurality of modules, different systems and different modules interact with one another, and the functions of automatic generating, intelligent correcting, storing and downloading of the electronic experiment reports are achieved. The electronic experiment report can be edited at a PC terminal and can also be edited at a mobile terminal. Studentscan fill in the experiment report at any time at the mobile terminal and check the correction condition of the experiment report, thereby saving time. And the correction of the experiment report canbe completed at the mobile terminal without time limitation, thereby saving the time of teachers and improving the working efficiency. The problem of information communication hysteresis between teachers and students is solved, role setting is free and flexible, the teachers can serve as both experiment teachers and project managers, and the teachers or the project managers can check the experiment report filling submission condition and the experiment report reviewing condition at any time. Meanwhile, paperless and green experiment reports are achieved, and the requirement for sustainable development of the modern society is met.

The invention discloses konjak curry powder, konjak frozen meat powder and jambalaya powder. The invention mixes the konjak essence powder and the varech amylase to prepare the konjak curry powder; the konjak essence powder is 55-75% of the total weight. The varech amylase is prepared by the Carla pure powder and the agaragar powder. The konjak curry powder is added with micro capsule meat powder essence, the salt, the monosodium glutamate and 1+G flavor agent to prepare the konjak frozen meat powder. The konjak curry powder is added with the acid agent, the micro capsule fruit essence to prepare the jambalaya jelly powder. The konjak curry powder of this invention has a scientific prescription; the material selection is fine and the practicability is great; the developed products have various types, novel samples which can satisfy the personal request for different groups of people. The konjak frozen meat powder contains 18 aminophenols, especially 7 element besides the must-have aminophenols, which has the effect of ''increasing the flavor''; the vitamin C is added in the konjak frozen meat powder for the triple effects of ''anti- oxidization'', ''increasing acid'' and ''nutrition''. The invention is never added with any antiseptics and chemically-compound pigment.

The invention discloses a digital display flow meter for experiment teaching based on piezometer tube display and a measuring method thereof. The digital display flow meter comprises a pressure difference flow signal generator, two pressure measuring assemblies, a pressure sensor, a microcomputer data display instrument head, a fixed bracket, and a scale, wherein the pressure difference flow signal generator is used for generating pressure difference signals, each pressure measuring assembly comprises a pressure measuring cylinder, a communication positioning tube and a pressure measuring tube, the pressure sensor is used for detecting the pressure difference of compressed air in the two pressure measuring cylinders, the microcomputer data display instrument head is used for converting pressure signals detected by the pressure sensor into flow, the fixed bracket is used for installing the pressure measuring tube, and the scale is used for calibrating the liquid level of the pressure measuring tube. According to the device and the method, the fluid mechanics principle is comprehensively adopted in an innovative way to solve the display difficulty of experiment measurement; besides the device and the method are combined with a traditional pressure measuring tube and a modern measurement technology, have high precision and high display, and can be widely applied to the fluid mechanics experiment teaching instrument; through the device and the method, learning interests of students are motivated, and innovative consciousness of students are inspired; thus the device and the method are beneficial to cultivate innovation capability and have good teaching effect.

The invention discloses an open-type hot water boiler heating experimental system which comprises a measuring control instrument disc, a programmable controller, a plurality of relays, a hot water boiler, a circulating pump, a make-up pump, a frequency converter, a connecting body water box, a radiator and an upper computer, and the open-type hot water boiler heating experimental system is characterized in that the programmable controller is connected with a controlling quantity output terminal through a system simulation quantity input terminal on the measuring control instrument disc so as to connect with hardware of the whole system; the programmable controller is connected with the upper computer through a serial interface RS485; and the hot water boiler is communicated with the radiator through a hot water pipeline, the radiator is connected with the circulating pump through a hot following pipeline, and the circulating pump is connected with the hot water boiler through a pipeline. The open-type hot water boiler heating experimental system provided by the invention has the advantages of less consuming material, long service life, low cost, reliable and stable performance, convenience in maintenance, and is suitable for being popularized and used in a teaching experiment link.

The invention provides a digital design method for three-dimensional prototype garments. The method comprises the following steps of: establishing a PHBC model according with human body features; obtaining human body feature information on the basis of the PHBC model; adding a loose measure for ensuring garment fitness at a self-defined position of the human body feature information; calculating zooming parameters of required horizontal sections according to the given loose measure, zooming all the sections according to the zooming parameters so as to obtain an edge frame with loose measure distribution; and establishing an expandable curved surface model through the edge frame, and constructing an expandable three-dimensional prototype garment according to the expandable curved surface model. Through the method, an expandable three-dimensional model base sample is realized, and a two-dimensional sample plate is directly obtained via the garment, so that the efficiency of pattern making and pattern modification is improved; deeper feature data of human body is obtained and three-dimensional human body data is deeply analyzed by utilizing a curved surface clustering method and curved surface geometric characteristic analysis method; and a garment structure according with human body is designed.

The invention discloses a solar energy measuring liquid heat conductivity coefficient experimental instrument and a measurement method thereof, and belongs to the field of physical experimental instruments. The instrument comprises a sliding rail, a heating plate rack, a cooling plate rack, a liquid sample containing tank, a heating plate, a cooling plate, a temperature sensor I, a temperature sensor II, a heat dissipation fan, a single chip computer temperature measurement and control instrument, a compression bolt, a compression nut, a solar photovoltaic power supply system and an electronictimer. The instrument is used for measuring the heat conductivity coefficient of liquid through a steady-state method, is simple to operate, visual in phenomenon, accurate in measurement data, smallin measurement error, high in repeatability, convenient in disassembly and assembly of all components, and convenient for experiments to be smoothly performed, and avoids the problem of slow teachingprogress caused by inconvenience in disassembly and assembly of the existing instruments.

The invention relates to a temperature control circulation etching processing device for circuit boards, which mainly comprises a box, an etching working portion, a liquid circulation system, a heating control device and an electric control portion. The temperature control circulation etching processing device is characterized in that the etching working portion is mounted in the box and consists of a base and a liquid flowing slope portion, a bottom plate, a front side plate and a rear side plate are welded to form the base, a plurality of through holes are respectively disposed on the front side plate and the rear side plate, liquid can flow through the through holes, electric wires can penetrate through the through holes, a pump mounting box is disposed on the bottom plate, the front side plate and the rear side plate, the liquid flowing slope portion is welded on the base, a long liquid groove is disposed at the front end of the liquid flowing slope portion by the aid of a partition board, and an inverted-V-shaped baffle plate which prevents liquid from ejecting when the liquid is pumped is additionally mounted in the liquid groove. The temperature control etching processing device for circuit boards is simple in structure, simple and convenient in operation, quick in manufacture, low in processing cost and applicable to electronic design training for students and creative teaching experiments of schools.

The invention relates to a game-based basic knowledge learning system for medical students, and belongs to the field of computers. The system comprises an intelligent man-machine interaction module, a storage module, a touch display module and a voice module, the intelligent man-machine interaction module is respectively connected with the storage module, the touch display module and the voice module; the intelligent man-machine interaction module comprises a'knowledge system 'module, a'game main line' module, a'game mode 'module, a'game type' module and a'innovative game '; the system adopts network connection in a client / server mode, and is provided with a server and two sets of software; one set of software serves the teacher client, and the other set of software serves the student client. And professional medical basic knowledge is learned in a game mode, so that students get rid of a hard-memorized and boring learning mode, and medical students are helped to master medical knowledge systematically and interestingly.

The invention relates to the technical field of electronic information, and particularly relates to an electronic certificate integrating a passive RFID certification label. The electronic certificate comprises a graduation certificate, an RFID passive electronic label, an RFID reader-writer and an RFID reader. The electronic certificate is characterized in that the RFID passive electronic label is additionally arranged at the back surface of the graduation certificate and an RIFD technology is used; the graduation certificate and the RFID passive electronic label are made into a whole; the low frequency used by the RFID passive electronic label is 100KHz-500KHz and a high frequency used by the RFID passive electronic label is 1.95MHz-13.56MHz. When a student graduates from school, the RFID reader-writer is used for writing all information of a graduate into an RFID chip by a school from which the student graduates; when the student applies for a work, an employer knows personal information of an applicant by using the RFID reader.

The invention relates to an on-way resistance virtual simulation experiment system and method, and the system comprises an on-way resistance virtual simulation experiment model which is used for the three-dimensional simulation of an on-way resistance experiment device; wherein the on-way resistance virtual simulation experiment model simulates water through a water body simulation module, and thewater body simulation module comprises a water flow simulation sub-module, a water surface simulation sub-module and a bubble simulation sub-module; an operation interface which is used for controlling and visually displaying the on-way resistance virtual simulation experiment model and carrying out an on-way resistance virtual simulation experiment; and an auxiliary teaching platform which comprises a student control module, a teacher control module and an administrator control module. Compared with the prior art, the system has the advantages that experiment teaching time and space are extended, experiment teaching mode reform and innovation are promoted, student innovation ability cultivation is promoted, the simulation effect is vivid, teaching functions are reasonable and complete, operation interface display is smooth, user friendliness is high, and teaching requirements are met.

The invention discloses a network type microcomputer relay protection experiment system and method, wherein the experiment system comprises N microcomputer relay protection devices, N simulation execution devices, a microcomputer relay protection tester, and a teacher-side computer which is provided with an experiment management program. One microcomputer relay protection device and one simulationexecution device are in bidirectional connection to form a group of experiment units for a group of experiment teams to carry out experiments, and the N groups of experiment units form a network typeexperiment system. The teacher-side computer is remotely connected with the microcomputer relay protection tester, the output end of the microcomputer relay protection tester is connected with the microcomputer relay protection device in each group of experiment units, and the microcomputer relay protection device in each group of experiment units is also connected with the teacher-side computer;the experiment system comprises N groups of same experiment units for N experiment teams to simultaneously carry out experiments on the same experiment project so as to achieve the purpose of competition of different experiment teams.

The invention relates to an all-solid-state neodymium-doped potassium-gadolinium tungstate laser experimental system, which relates to teaching experiments and scientific researches, and is particularly suitable for the studies and the researches on the principles and the characteristics of laser by teachers and students of photo-electricity profession in various universities and colleges. The laser experimental system consists of a laser power supply, an LD laser, an Nd: KGd(WO4)2 laser crystal, a KTP frequency doubling crystal, a passive Q-switching crystal, a laser output mirror, a picosecond grade photodiode, a red laser aligner, an optical track, a sliding seat, an optical bench, a mirror holder, a safe interlocking switch, a special connecting cable and a dustproof protecting cover. With the application of the all-solid-state neodymium-doped potassium-gadolinium tungstate laser experimental system, the national optics educational standard can be improved, the innovation ability and the research and development thinking of students can be cultivated, the development progress of the prior solid-state laser can be known, and the latest laser techniques of the prior world can be mastered.

The invention provides a semi-supervised learning image classification method, which comprises the following steps of: creating a classification task, and triggering a training request of the classification task based on a plurality of sample data added to the classification task; in response to the training request, calling a large model to train the plurality of sample data so as to learn and obtain a target small model; wherein the large model is a pre-trained fixed model; and performing feature extraction on a to-be-detected image through the large model, and inputting a first output result of the large model to the target small model to obtain a second output result of the target small model after classification reasoning. The invention further provides a semi-supervised learning image classification system, a storage medium and computer equipment. Therefore, the classification model can be obtained through training and learning of a small amount of sample data, the threshold of artificial intelligence tasks is lowered, and actual operation experience service can be provided for artificial intelligence popularization education.

The invention discloses a virtual simulation experiment system for ginkgo twig cutting seedling. The virtual simulation experiment system comprises four links including cutting medium preparation, cutting slip treatment, a cutting process and post-cutting management and fourteen specific operation steps in the four links. Meanwhile, six modules including an experiment previewing self-test module,a full-process experiment module, an exploratory experiment module, a knowledge learning and expanding module, an experiment prompt and help module and an experiment assessment and evaluation module are arranged; an experiment scene is simulated virtually, and an experiment facility is constructed; corresponding parameters of experiment design are set by utilizing a virtual experiment environmentparameter setting device, and experiment results are presented from a system foreground terminal in visual forms of scenes, graphs, tables and the like. The constructed system is powerful in function,the whole process and environment of cutting seedling production are reproduced, the simulation degree is high, and the experience feeling is strong; the teaching effect and environment of a real experiment are simulated and restored; the experiment time is shortened, the learning efficiency is improved, and the method has wide popularization and utilization prospects in teaching of cutting seedling experiments in agriculture and forestry colleges.

The invention discloses a solar energy measuring material heat conductivity coefficient experimental device and a measuring method thereof. The solar energy measuring material heat conductivity coefficient experimental device comprises a slideway, a heating disc frame, a heat dissipating disc frame, a poor conductor sample frame, a poor conductor sample, a metal sample, a metal sample frame, a heating disc, a heat dissipating disc, a first temperature sensor, a second temperature sensor, a heat dissipation fan, a single chip computer temperature measurement and controller, a compression bolt,a compression nut and a solar photovoltaic power supply system. The measuring device is used for measuring the heat conductivity coefficient of poor conductors and metal materials by utilizing a steady state method. The device is intuitionistic in phenomenon, accurate in measurement data, small in measurement error and good in repeatability, the components are convenient to dismount and mount, thus tests can be conducted smoothly, and the problem that an existing instrument is inconvenient to dismount and mount so that the teaching progress can be slow is avoided. The device improves the testprecision and test efficiency, and can be widely applied to scientific research, education and production.

The invention relates to a vertical pulling type three-dimensional adjustable experimental instrument for quantitatively verifying a cone up-rolling condition. The vertical pulling type three-dimensional adjustable experimental instrument comprises support legs, a base, a leveling spirit bubble, an initial end support leg, a base center line scale ruler, two guide rail initial position projection lines, a left guide rail tail end support leg, a left support leg vernier scale, a right support leg, a right support leg vernier scale, a guide rail tail end leg support leg, a support leg position indication main scale, a left guide rail and a right guide rail. The vertical pulling type three-dimensional adjustable experimental instrument has the beneficial effects of convenience in operation and high experiment accuracy.

The invention discloses a comprehensive teaching experiment platform for a fiber laser. The comprehensive teaching experiment platform comprises a power supply module, a light source module, an optical fiber device, an optical fiber processing module, a test module and a data acquisition module. The power supply module is used for providing a power supply; the light source module is used for providing a pump light source and a test light source; the optical fiber device is used for building various cavity types of the laser; the optical fiber processing module is used for processing optical fibers; the test module is used for testing characterization; and the data acquisition module is used for acquiring test characterization data. According to a technical scheme of the invention, the teaching experiment platform can execute teaching experiments such as optical fiber fusion splicing, component measurement, optical fiber fluorescence characteristic test, forward and backward linear cavity structure optical fiber lasers, ring cavity optical fiber lasers, active and passive Q-switched optical fiber lasers, mode-locked optical fiber lasers and optical fiber amplifiers, so the diversity of teaching experiments is improved, and an application range is wide; and in addition, the open type optical fiber device is adopted, so innovation capability can be cultivated while practical operation enthusiasm is cultivated.

The invention provides a modular education robot control device. The device is embedded in a robot body. The device comprises a controller, a power supply unit, a driving unit, a communication unit, asensor unit and a storage unit. The controller is embedded in the robot. According to the invention, the device serves as a very good platform for innovation design practice, so that the eye boundaryof students can be expanded. The innovation capability, the problem parsing and solving capabilities and the practical action capability of students are cultivated. A TTL bus-steering engine controlscheme is adopted, so that the characteristics of on-line debugging, program downloading, offline execution and the like are realized. The modular education robot is applied to the mechanism teaching.By adopting the modular education robot, not only the manipulative ability and the innovation ability of students are exercised, but also the understanding of students in robot concept is also enhanced from childhood.

The invention discloses a special colored water siphon valve type electronic control feeder for a Reynolds experiment and a method thereof. The feeder comprises a colored water storage box, air tubes, an electronic control three-way air valve, an air pump, an air tap, a colored water filling port and sealing cover, a siphon, a colored water discharge tube, an electronic control two-way air valve, a colored water injection needle and a control circuit; electronic control for opening, closing or concentrating of the colored water can be completed under the operation of the control circuit. According to the feeder and the method, a series of defects that blocking is easy, dredging is difficult, the concentration is difficult to adjust, the operation is inconvenient and the like during regulation of a traditional micro valve for the colored water are overcome, and particularly, the blank of the electronic control feeder for the colored water in the automated control type Reynolds experiment is filled up.

The invention discloses a self-exhaust type multi-pressure measuring tube manometer, which comprises: more than two pressure measuring tubes; a flow divider connected with more than two pressure measuring tubes; connecting the pressure measuring tubes and the flow divider damping element; an air pump connected to said flow divider. The present invention utilizes the damping element to provide pressure-limited flow-limited gas supply to each pressure-measuring tube, so as to realize the self-exhausting synchronous exhaust function of one pump and multiple tubes. The electric exhaust method is used to fill the blank of the electronically controlled self-exhaust multi-tube manometer in the automatic control system. As a fluid mechanics experiment teaching instrument, the invention innovatively uses the principle of fluid mechanics to solve experimental problems, can stimulate students' interest in learning, inspire students' innovation consciousness, is beneficial to cultivating innovation ability, and has a good teaching effect.

The invention discloses a bypass and bi-stable type on-way resistance experiment instrument and a method thereof. The instrument comprises a water storage tank, a high-lift water pump, a water supply pipe, a manual or electric valve, a thin current-limiting bypass throttle pipe, a pressure-stabilizing tank, an experiment pipeline, a flow regulating valve, a funnel, a water return pipe, a measuring instrument and the like. The on-way resistance experiment instrument is required to have dual functions of a laminar flow experiment and a turbulent flow experiment. When all the valves are closed, pressurized water, pumped from the water pump, in front of the valves flows to the experiment pipeline via the bypass pipe, and the bypass pipe can well eliminate fluctuation, caused by the water pump, of pressure of water in front of the valves and play good roles in wave absorbing and pressure stabilizing. The pressure-stabilizing tank performs secondary pressure stabilization, the pressure stabilizing accuracy is within plus / minus 0.5 mm, and the pressure-stabilized water supply requirement for the laminar flow experiment can be met under the condition of direct supply by the water pump. The problem of stabilization of the laminar flow experiment under the condition of direct supply by the water pump is solved. Meanwhile, at the turbulent flow stage, the pressure-stabilizing tank stabilizes the pressure, and the good turbulent flow pressure stabilization effect is realized. The experiment instrument is stable in pressure, high in measuring accuracy, simple in structure and convenient to operate.

The invention discloses a bypass type laminar flow experiment voltage stabilizer and a method thereof. The bypass type laminar flow experiment voltage stabilizer is provided with a water pump water outlet pipe, a valve, a bypass thin throttle pipe, a voltage stabilization tank and an experiment pipeline water supply pipe. Input water body pressure of the bypass type laminar flow experiment voltage stabilizer is large in fluctuation under influences of a water pump. For eliminating a pressure fluctuation phenomenon of a laminar flow experiment when flow rate is small, bypass pipes are arranged at the upper end and the lower end of the valve. The laminar flow experiment is performed when the valve is completely closed, and simultaneously a fluctuation water current in front of the valve only can flow through the bypass pipes to the rear of the valve. The thickness and the length of the bypass pipes can right control excess flow in a flow range needed by laminar flow. Then, secondary voltage stabilization is performed on the fluctuation water current through the bypass type laminar flow experiment voltage stabilizer, and when the fluctuation water current flows to an output end of the bypass type laminar flow experiment voltage stabilizer, voltage stabilization accuracy of the fluctuation water current is controlled within + / - 0.5mm, and therefore voltage stabilization water supply demands of the laminar flow experiment are met under direct supply conditions of the water pump. The bypass type laminar flow experiment voltage stabilizer and the method thereof solve the problem that a laminar flow experiment is difficultly stabilized under the direct supply conditions of the water pump for a long time. The bypass type laminar flow experiment voltage stabilizer is simple in structure, convenient to operate, and low in cost.

The invention creatively provides a modular educational robot design method which comprises the following steps of (1) performing model conception of a robot; and (2) motion planning and simulation design: predefining an initial state and a target state of the robot, then performing trajectory sequence design from the initial state to the target state, generating a joint trajectory of the robot, and finishing a motion task. The modular educational robot design method improves the manipulative ability of primary and secondary school students and can also strength the robot concept. A modular reconfigurable robot which takes a mechanism as a subject emphasizes on robot mechanism innovation, sets up the concept of the robot of the students, cultivates the innovation ability of the students, can play a big role in the field of robot teaching, extracurricular practices and the like and is wind in market prospect in future.

The invention relates to a traction testing device, in particular to a bridge bearing traction type testing device used for a student experiment, comprising a bearing trolley, a hook and a steel rope. The bridge bearing traction type testing device is characterized in that the hook on the trolley is connected with a traction device through the steel rope. The traction device comprises a reel base, a rocking handle, a hook, a rope wheel and a shaft, wherein the shaft is provided with the rocking handle, and the reel base is connected with the rope wheel through the shaft on the rocking handle. The traction device is arranged at the front end and the back end of the bearing trolley. A support of the reel base is an expansion bracket. The bearing trolley is hauled through the steel rope through a manual rocking handle in a labor saving way, thereby the bearing pressure when the bearing trolley passes a bridge can be tested. If the weight of a bearing ingot slice to be tested on the trolley exceeds the bearing capacity of the bridge, the handle can be shaken at once by the other end of the bearing trolley to pull back the trolley when the bridge has deformation or rupture, thereby the safety hidden danger caused by falling of the trolley is avoided. Bridges with different heights can be tested by adopting the expansion bracket, and the creative ability of a student is cultured through a test activity.

The invention discloses a digital display flowmeter with a pressure measuring tube display for experimental teaching and a measuring method, comprising: a differential pressure flow signal generator for generating differential pressure signals; two sets of pressure measuring components, each set of pressure measuring components The assembly includes a pressure measuring cylinder, a connecting positioning tube and a pressure measuring tube; a pressure sensor used to detect the pressure difference of compressed air in the two pressure measuring cylinders; a microcomputer digital display meter used to convert the pressure signal detected by the pressure sensor into a flow rate ; A fixed bracket for the pressure measuring tube; a scale scale for calibrating the liquid level in the pressure measuring tube. The device and method of the present invention comprehensively and innovatively use the principle of fluid mechanics to solve the problem of experimental measurement and display, and combine the traditional pressure measuring tube and modern measurement technology, with high precision and high display, and can be widely used in fluid Among the mechanical experiment teaching instruments, it can stimulate students' interest in learning and inspire students' innovation consciousness, which is beneficial to the cultivation of innovation ability and has a good teaching effect.

The invention discloses a hydroelectric analogue simulation experimental device with a two-dimensional motion platform measurement function. The hydroelectric analogue simulation experimental device comprises a model basin, a probe and a hydroelectric analogue simulation experimental instrument connected with the probe. An electricity-conducting two-dimensional motion platform is arranged on the model basin. An X-axis ruler and a Y-axis ruler are marked on the two-dimensional motion platform. The probe is mounted on the two-dimensional motion platform and is electrically connected with the two-dimensional motion platform. The hydroelectric analogue simulation experimental device has the advantages that the electricity-conducting two-dimensional motion platform is applied to the hydroelectric analogue simulation experimental device innovatively, a dragging guide line conventionally applied to the probe is omitted, and a drag-free guide line is used, so that the problem that a flow field is affected by the fact that the dragging guide line is prone to soaking is solved; the X-axis ruler and the Y-axis ruler are marked on the two-dimensional motion platform, so that the problem of measurement errors caused by the fact that the probe is out of plumb easily as being held by hands is solved; a full-scale amplification and regulation circuit is applied innovatively, equipotential line values, in percentage, of measuring points can be displayed directly by the experimental instrument, and manual conversion is not needed.

The invention discloses a method for freely assembling a photo album and a photo album structure. The method for freely assembling the photo album, provided by the invention, comprises the steps of: selecting a front cover, a back cover, core pages, binders and decorative accessories of the photo album as required, assembling the front cover, the back cover and the core pages into the photo album by using the binders capable of being freely mounted and dismounted, and decorating the front cover, the back cover and the core pages of the photo album by using the decorative accessories to constitute the individualized photo album. The invention further provides the photo album capable of being freely assembled, and the photo album is structurally characterized by comprising constituent parts including the front cover, the back cover, the core pages, and the binders, wherein the front cover ,the back cover and the core pages can be freely assembled through the binders capable of being freely mounted and dismounted, and can also be decorated in an individualized manner by using the decorative accessories. The method and the structure, disclosed by the invention, are simple and flexible, and can well meet the individualized requirements of people. In the DIY (DO It Yourself) free assembly process of the photo album, the practice ability, the aesthetic judgment ability and the artistic interests of a user are favorably fostered.

The invention discloses a gravitational acceleration tester. The gravitational acceleration tester comprises rectangular magnets, an insulation communicating device, a steady direct-current power supply and a double-pole-double-throw switch, wherein the insulation communicating device comprises two liquid channels arranged symmetrically, the liquid channels communicate at the bottom of the insulation communicating device, the liquid channels are arranged along the vertical direction, electrodes are arranged on two sides of the bottom end of the insulation communicating device, and the rectangular magnets are arranged at the lower part of the insulation communicating device; liquid resistors are arranged in the liquid channels; and by adjusting the steady direct-current power supply, the magnitude of current is changed, or by changing the number of the magnets, the magnetic induction intensity is changed, thus the liquid level height difference at two ends of the communicating device ischanged, the height difference reflects the gravity difference, the gravitational acceleration of the local experiment place is obtained through calculation, with the double-pole-double-throw switch,the polarity of the pure-copper-plate electrode can be switched, reverse copper plating is carried out, then the liquid level is changed to be low on the left and high on the right from being high onthe left and low on the right, or is changed to be high on the left and low on the right from being low on the left and high on the right, thermoelectricity and thermomagnetic side effect are eliminated through the symmetric measurement method of current, and therefore, the measurement result is more accurate.