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Method and device for measuring double-prism refractive index on basis of optical levers
InactiveCN103884490ASuitable for useThe experimental phenomenon is intuitiveTesting optical propertiesPlane mirrorRefractive index
The invention relates to a method and device for measuring the double-prism refractive index on basis of optical levers. The device comprises a base, a sliding rail, a laser self-aligner, a support and a ruler, wherein the base is provided with the sliding rail, the sliding rail is provided with a screw rod, the screw rod penetrates through the lower end of an objective table and is connected with the objective table, when the screw rod is rotated, the objective table can move horizontally on the sliding rail, one end of the guide rail is provided with a lifting block, the other end of the guide rail is provided with the laser self-aligner, the support is installed on the end portion of the base, the support is provided with an optical lever set, the sliding rail is provided with a leveling screw and a positioning screw, the horizontal angle of the sliding rail is adjusted through the leveling screw, the lifting block can ascend and descend through rotation of the positioning screw at the lower end of the lifting block, the ruler is composed of a plane mirror, and the surface of the plane mirror is provided with millimeter graduations. According to the method and device, experiment phenomena are visual, precision is high, cost is low, operations can be easily and conveniently carried out, new college physical experiment items can be developed through the method and device, and the method and device are suitable for being used in colleges.
Owner:INNER MONGOLIA UNIV OF SCI & TECH
Experimental device and method for measuring Young modulus of metal wire according to simple harmonic vibration
InactiveCN105806708ABroaden your mindCultivate the spirit of innovationMaterial strength using tensile/compressive forcesHarmonic vibrationYoung's modulus
The invention relates to a device and method for measuring the Young modulus, in particular to an experimental device and method for measuring the Young modulus of a metal wire according to simple harmonic vibration.The device and method aim at solving the problems that the experiment principle for measuring the Young modulus of the metal wire in a college physics experiment is single and abstract in the prior art.According to the device, a cross beam is arranged at the upper end of a support, an upper chuck and a force sensor are arranged in the middle of the cross beam, the two ends of the metal wire are connected with the force sensor and a lower chuck respectively, and the lower chuck and a metal frame into which an iron block is fixed are fixed together.A measuring device is composed of a differential bridge composed of four capacitors composed of fixed polar plates and movable polar plates, an adjustable alternating voltage source, a voltage amplifying device, a digital oscilloscope and the like.According to the method, the digital oscilloscope is used for measuring the period of periodically-changing bridge output voltage waveforms, the period during which a metal wire spring oscillator conducts simple harmonic vibration is obtained, the period is substituted into a formula, and the Young modulus of the metal wire is calculated.The device and method are suitable for measuring the Young modulus of the metal wire.
Owner:田凯
Simple harmonic oscillation based experimental device and method for measuring Young's modulus with beam bending method
InactiveCN106018556ARich content of physical experimentsRich experimental contentAnalysing solids using sonic/ultrasonic/infrasonic wavesEducational modelsMeasurement devicePlane mirror
The invention provides a simple harmonic oscillation based experimental device and method for measuring the Young's modulus with a beam bending method, relates to a Young's modulus measurement device and method and aims to solve the problems that the experimental principle of the Young's modulus measurement with the beam bending method in current college physical experiments is comparatively single and abstract and a telescope is greatly difficult to adjust. The device is characterized in that two vertical columns are arranged on a base, two ends of a metal beam with a rectangular section are freely arranged in a spanning manner at tool edges at the upper ends of the vertical columns, the metal beam is sleeved with a copper frame, a force sensor and an iron block are arranged at the lower end, an electromagnet device is arranged below the iron block, a scale is arranged on a scale base, and a laser and a photoelectric sensor connected with an intelligent photoelectric timer are arranged on the scale. According to the method, a cycle of simple harmonic oscillation performed by a metal beam spring oscillator is obtained on the basis of measurement of a cycle of the simple harmonic oscillation performed by light spots formed on the scale by a laser beam which is emitted by the laser and reflected through a plane mirror of an optical lever, the cycle of the simple harmonic oscillation performed by the metal beam spring oscillator is substituted into a formula, and the Young's modulus is obtained through calculation. The device and the method are applicable to measurement of the Young's modulus.
Owner:HUANGHE S & T COLLEGE
Experimental device and method for measuring Young's modulus of steel wire through resonance phenomenon
InactiveCN105810053ARich content of physical experimentsRich experimental contentEducational modelsAudio power amplifierExperimental methods
An experimental device and method for measuring the Young's modulus of metal wire by using resonance phenomenon, relating to a Young's modulus measuring device and method, the present invention is to solve the experimental principle comparison of measuring the Young's modulus of metal wire in the current university physics experiment Single and abstract, it is difficult to adjust the telescope. The device of the present invention includes setting a crossbeam on the upper end of the support, setting an upper clamp and a vibration exciter in the middle of the beam, and the two ends of the metal wire are connected with the vibration exciter and the lower clamp respectively, and the lower clamp is fixed with an iron block. The vibrator is arranged, the vibrator is connected with the signal source, and the vibrator is connected with the amplifier and the oscilloscope; the method of the present invention utilizes the vibrator to convert the sinusoidal signal into a mechanical vibration, so that the metal wire spring vibrator is forced to vibrate, and the vibration is picked up. The converter converts it into an electrical signal, adjusts the frequency of the sinusoidal signal, and obtains the natural frequency of the wire spring vibrator when the waveform amplitude is maximum, and substitutes it into the formula to calculate the Young's modulus of the wire. The invention is applicable to the measurement of the Young's modulus of the metal wire.
Owner:田凯
Method for judging dewatering performance of different plasters
The invention relates to a method for judging dewatering performance of different plasters. The method comprises the following steps of: taking bottom flow grout of different plaster cyclones; adding water into the grout until the densities of the grout are the same; taking the grout with the same volume; putting the grout into graduated transparent containers respectively; uniformly stirring the grout; and judging the dewatering performance of the plasters according to the time needed by the settlement of solid in each container to the same height. Needed time is shorter, settling property is better and the dewatering performance of the plaster is better. The method has the characteristics of simple, convenient and rapid operation, a small number of apparatuses needed for testing and capability of vividly judging the dewatering performance of different plasters and is particularly suitable for the running site of a limestone-plaster wet flue gas desulfurization process in a coal-fired power plant.
Owner:STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
Experimental device and method for measuring Young modulus with beam bending method based on resonance principle
InactiveCN106018555ARich content of physical experimentsRich experimental contentAnalysing solids using sonic/ultrasonic/infrasonic wavesEducational modelsMeasurement deviceYoung's modulus
An experimental device and method for measuring Young's modulus by the beam bending method based on the resonance principle relates to a Young's modulus measuring device and method. Difficult question. The device of the present invention includes two columns on the base, the two ends of the metal beam with rectangular cross-section are freely straddled on the knife edge of the upper end of the column, a copper frame is placed on the metal beam, and a vibration exciter and a movable armature are arranged at the lower end. Connected with the signal source, the measuring device is composed of a differential bridge composed of two inductance coils and two resistors, an AC voltage source, an amplifying device and an oscilloscope; the method of the present invention converts a sinusoidal signal into a mechanical vibration by using an exciter to make the metal The beam spring vibrator is forced to vibrate, and the electric bridge composed of variable inductance is converted into an electrical signal, and the frequency of the signal is adjusted. When the waveform amplitude is maximum, the natural frequency of the metal beam spring vibrator is obtained, and the Young's modulus is calculated. The invention is applicable to the measurement of Young's modulus.
Owner:田凯
Experiment device and method for measuring metal wire Young modulus based on simple harmonic vibration
InactiveCN106053268ARich experimental contentBroaden your mindEducational modelsMaterial strength using repeated/pulsating forcesMeasurement devicePlane mirror
The invention discloses an experiment device and method for measuring metal wire Young modulus based on simple harmonic vibration, relates to a Young modulus measuring device and method, and aims to solve the problems that in the conventional university physical experiments, the experiment principle for measuring metal wire Young modulus is single and abstract, and the telescope is hard to adjust. The experiment device comprises a crossbeam, which is arranged on the upper end of a support; a platform is arranged on the middle of the support; an upper clamping head and a force sensitive sensor are arranged on the middle of the crossbeam; two ends of a metal wire are respectively connected to the force sensitive sensor and a lower clamping head, and the lower clamping head is connected to an iron block. A scale is arranged on a scale base, a laser device and a photoelectrical sensor that is connected to an intelligent photoelectrical timer are arranged on the scale. According to the method, the period of simple harmonic vibration of optical spot that is formed on the scale and is generated by reflecting laser beams emitted by the laser device by a plane mirror of an optical lever is measured so as to obtain the period (T) of simple harmonic vibration of a metal wire spring vibrator, and the period (T) is substituted into a formula to calculate the metal wire Young modulus. The provided device and method are suitable for measuring metal wire Young modulus.
Owner:田凯
Thrust sliding bearing lubricating property teaching demonstration device
InactiveCN104658403AThe experimental phenomenon is intuitiveEasy to observeEducational modelsThrust bearingHydrostatic pressure
The invention relates to a thrust sliding bearing lubricating property teaching demonstration device belonging to the technical field of aided teaching instruments and experimental facilities. The thrust sliding bearing lubricating property teaching demonstration device comprises a support, a loading disc, experimental bearing bushes and an oil cylinder, wherein the oil cylinder and the loading disc are respectively arranged on the support by shafts; the plurality of experimental bearing bushes are arranged in the oil cylinder in circumferential directions; the loading disc is arranged above the experimental bearing bushes; the loading disc and the oil cylinder are coaxially arranged; the loading disc is driven by a motor to rotate; a loading mechanism is arranged on the loading disc; a push plate is arranged outside the oil cylinder; and the support is provided with a dial indicator corresponding to the push plate. By utilizing the thrust sliding bearing lubricating property teaching demonstration device, demonstrative experiment of common plane thrust bearing bush, hydrostatic pressure thrust bearing bush and tilting thrust bearing bush can be carried out, experimental phenomenon is visual, and observation and understanding are convenient.
Owner:NORTHEASTERN UNIV
Experimental device and experimental method for measuring Young modulus with simple harmonic vibration beam bending method
InactiveCN106128234ARich experimental contentBroaden your mindEducational modelsMeasurement deviceMetallic materials
An experimental device and method for measuring Young's modulus by the beam bending method of simple harmonic vibration relates to a Young's modulus measuring device and method. The principle is single and abstract, and the adjustment of the telescope is difficult. The device of the present invention includes setting two uprights on the base, and the two ends of a metal beam with a rectangular cross-section are freely straddled on the knife edge at the upper end of the uprights, a copper frame is placed on the metal beam, and a force-sensitive sensor, a movable armature and an iron block are set at the lower end , the electromagnet device is arranged below, and the measuring device is composed of a differential bridge formed by two inductance coils and two adjustable resistors, an adjustable AC voltage source, a voltage amplification device, and a digital oscilloscope; the method of the present invention measures the period by a digital oscilloscope The cycle of the output voltage waveform of the bridge that changes permanently is obtained to obtain the cycle of the simple harmonic vibration of the metal beam spring vibrator, which is substituted into the formula to calculate the Young's modulus of the metal material. The invention is applicable to the measurement of Young's modulus.
Owner:田凯
Wave-optical comprehensive test instrument equipment
InactiveCN106643527AImprove performanceImprove efficiencyUsing optical meansEducational modelsCombined testGrating
Owner:TAIYUAN INST OF TECH
Experiment device and method for measuring Young modulus of metal wire according to resonance
InactiveCN106053265ARich content of physical experimentsRich experimental contentMaterial strength using repeated/pulsating forcesHall elementResonance
The invention discloses an experiment device and method for measuring the Young modulus of a metal wire according to resonance principle, relates to a Young modulus measuring device and method, and aims to solve the problem that in the conventional university physical experiments, the experiment principle for measuring metal wire Young modulus is single and abstract, and the telescope is hard to adjust. The device comprises a crossbeam, which is arranged on the upper end of a support. An upper clamping head and a vibration generator are arranged on the middle of the crossbeam. Two ends of a metal wire are respectively connected to the vibration generator and a lower clamping head. The lower clamping head and a metal frame are fixed together. The vibration generator is connected to a signal source. A measuring device is composed of a Hall element, a measurement controller, a voltage amplifying device, and an oscilloscope. The sinusoidal signals are converted into mechanical vibration by the vibration generator to force a metal wire spring oscillator to vibrate, the vibration is converted into electric signals by the Hall element, the signal frequency is adjusted, when the waveform amplitude is the largest, the inherent frequency of the metal wire spring oscillator is obtained, and the inherent frequency is substituted into a formula to calculate the Young modulus of the metal wire. The provided method is suitable for measuring the Young modulus of a metal wire.
Owner:田凯
Experimental device and method for measuring Young modulus through beam bending method based on simple harmonic oscillation
InactiveCN106092747ARich content of physical experimentsRich experimental contentMaterial strength using tensile/compressive forcesHall elementMetallic materials
The invention discloses an experimental device and method for measuring the Young modulus through a beam bending method based on simple harmonic oscillation, relates to a Young modulus measuring device and method and aims at solving the problems that in current college physical experiments, the experiment principle for measuring the Young modulus through the beam bending method is single and abstract, and the adjustment difficulty of a telescope is high. The device comprises two stand columns arranged on a base, wherein the two ends of a metal beam with a rectangular section are freely arranged on knife edges at the upper ends of the stand columns in a crossover mode, the metal beam is sleeved with a copper frame, a force sensor and a metal frame are arranged at the lower end of the metal beam, an iron block is fixed into the metal frame, an electromagnet device is arranged below the metal beam, and a measuring device is composed of a Hall element, a measurement controller, a Hall voltage amplification device, a digital oscilloscope and the like. According to the method, the cycle of a periodically-changing Hall voltage waveform is measured through the digital oscilloscope, the cycle of simple harmonic oscillation of a spring oscillator of the metal beam is obtained and substituted into a formula, and the Young modulus of a metal material is calculated. The experimental device and method are suitable for measurement of the Young modulus.
Owner:田凯
Method and device for measuring refractive index of double prism based on optical lever
InactiveCN103884490BSuitable for useThe experimental phenomenon is intuitiveTesting optical propertiesPlane mirrorRefractive index
Owner:INNER MONGOLIA UNIV OF SCI & TECH
Experiment device and method for measuring Young modulus by beam bending method via resonance principle
InactiveCN106198748ARich experimental contentBroaden your mindAnalysing solids using sonic/ultrasonic/infrasonic wavesEducational modelsPhysicsMeasurement device
The invention provides an experiment device and method for measuring Young modulus by a beam bending method via resonance principle, and relates to a Young modulus measuring device and method. The device and the method solve the problems that in the prior art, when the beam bending method is used for measuring the Young modulus, the experiment principle is simple and abstract, and the regulation difficulty of a telescope is high. The experiment device comprises two upright posts arranged on a base, wherein two ends of a rectangular cross section metal beam freely step across cutter openings formed in the upper ends of the upright posts; a copper framework sleeves the metal beam; a vibration exciter and a metal framework are arranged at the lower end; the vibration exciter is connected with a signal source; a measuring device consists of an oscilloscope, an amplifying device, an alternating voltage source and a differential electric bridge formed by four magnetosensitive resistors. The method has the advantages that the vibration exciter is used for converting a sinusoidal signal into mechanical vibration, so that a metal beam spring oscillator does forced vibration; the vibration is converted into an electric signal by the electric bridge formed by the magnetosensitive resistors; the signal frequency is regulated; when the waveform amplitude is the maximum, the inherent frequency of the metal beam spring oscillator is obtained; the Young modulus is calculated out. The device and the method are applicable to Young modulus measurement.
Owner:田凯
Experiment device and method adopting resonance principle to measure Young modulus of metal wire
InactiveCN106053606ARich content of physical experimentsRich experimental contentAnalysing solids using sonic/ultrasonic/infrasonic wavesEducational modelsElectrical resistance and conductanceResonance
The invention relates to an experiment device and method adopting a resonance principle to measure the Young modulus of a metal wire, relates to a Young modulus measuring device and method, and aims to solve the problems that in the conventional university physical experiments, the experiment principle for measuring metal wire Young modulus is single and abstract, and the telescope is hard to adjust. The device comprises a crossbeam, which is arranged on the upper end of a support. An upper clamping head and a vibration generator are arranged on the middle of the crossbeam. Two ends of a metal wire are respectively connected to the vibration generator and a metal frame. The vibration generator is connected to a signal source. A measuring device is composed of a differential bridge composed of four magnetic sensitive resistors, an alternating voltage source, an amplification device, and an oscilloscope. According to the method, the sinusoidal signals are converted into mechanical vibration by the vibration generator so as to force a metal wire spring oscillator to vibrate. The differential bridge composed of magnetic sensitive resistors is converted into electric signals. The signal frequency is adjusted. When the waveform amplitude is the largest, the inherent frequency of the metal wire spring oscillator is obtained. Then the inherent frequency is substituted into a formula to calculate the Young modulus of the metal wire. The provided method is suitable for measuring the Young modulus of a metal wire.
Owner:田凯
Experimental device and method for measuring Young modulus according to simple harmonic vibration beam bending method
InactiveCN106226165ARich content of physical experimentsRich experimental contentMaterial strength using steady bending forcesHarmonic vibrationYoung's modulus
The invention discloses an experimental device and method for measuring the Young modulus according to a simple harmonic vibration beam bending method, and relates to a Young modulus measuring device and method. The device and method are aimed at solving the problems that in current college physics experiments, the experiment for measuring the Young modulus through the beam bending method is simple and abstract in theory and the adjustment difficulty of a telescope is large. According to the device, two stand columns are arranged on a base, the two ends of a rectangular-section metal beam are freely arranged on tool edges of the upper ends of the stand columns in a striding mode, the metal beam is sleeved with a copper frame, the lower end of the metal beam is provided with a force sensor and a metal frame, an iron block is fixed into the metal frame, an electromagnet device is arranged below the metal beam, the measuring device is composed of a differential bridge, an adjustable AC voltage source, a voltage amplifying device, a digital oscilloscope and the like, the differential bridge is composed of four capacitors, and each capacitor is composed of a fixed electrode plate and a movable electrode plate. By means of the method, the voltage waveform output cycle of the periodically-changing bridge is measured through the digital oscilloscope, and the simple harmonic vibration cycle of a spring oscillator of the metal beam is obtained and substituted into a formula so that the Young modulus can be calculated. The device and method are suitable for measuring the Young modulus.
Owner:田凯
Experiment apparatus and method for measuring Young modulus based on beam deflection technology of resonance principle
InactiveCN106248501ARich experimental contentBroaden your mindMaterial strength using steady bending forcesMeasurement deviceYoung's modulus
The experimental device and method for measuring Young's modulus by the beam bending method based on the principle of resonance relates to a Young's modulus measuring device and method. Problems that are difficult to adjust. The device of the present invention includes setting two columns on the base, the two ends of the metal beam with rectangular cross-section are freely straddled on the knife edge of the upper end of the column, a copper frame is placed on the metal beam, and the vibration exciter and the metal plate for fixing the iron block are arranged at the lower end. The framework, the exciter is connected with the signal source, and the measuring device is composed of a Hall element, a measurement controller, a voltage amplification device and an oscilloscope; the method of the present invention uses the exciter to convert the sinusoidal signal into mechanical vibration, so that the metal beam spring vibrator is subjected to The forced vibration is converted into an electrical signal by the Hall element, and the frequency of the signal is adjusted. When the waveform amplitude is the largest, the natural frequency of the metal beam spring vibrator is obtained, and the Young's modulus is calculated by substituting it into the formula. The invention is applicable to the measurement of Young's modulus.
Owner:田凯
Electric shock demonstration device
The invention discloses an electric shock demonstration device, and relates to the field of teaching tools. The electric shock demonstration device comprises a plank, small bulbs, a transformer, metal rods and a metal plate, the metal plate is placed on the plank, the end, installed on the plank, of the transformer is connected with the commercial power, a live line and a null line are led out from the other end of the transformer, the metal rods are installed on the left lower portion of the plank, the metal rods are connected through steel wires, the small bulbs are installed on the steel wires, and the live line and the null line are connected with the steel wires; the electric shock demonstration device further comprises a person-shaped toy and a tree, an iron wire is arranged at the head of the person-shaped toy, metal hooks are arranged on the left hand and the right hand, copper plates are arranged at the foot soles, LED lamp strips are arranged between the left hand and the metal hooks and between the right hand and the metal hooks, LED lamp strips are arranged between the left-hand metal hooks and the left-foot copper plate, a neon pipe is arranged on the abdomen, pipe pins of the neon pipe penetrate through the thighs to be connected with the foot-sole copper plates, and the tree is installed at the left upper corner of the plank. The electric shock demonstration device is safe and easy to operate and visual in simulation.
Owner:NANNING NO 2 HIGH SCHOOL
Experiment device and method for measuring Young modulus of metal wire according to simple harmonic vibration
InactiveCN106053270ABroaden your mindCultivate the spirit of innovationMaterial strength using repeated/pulsating forcesMeasurement deviceHall element
The invention discloses an experiment device and method for measuring the Young modulus of a metal wire according to simple harmonic vibration, relates to a Young modulus measuring device and method, and aims to solve the problems that in the conventional university physical experiments, the experiment principle for measuring metal wire Young modulus is single and abstract, and the telescope is hard to adjust. The device comprises a crossbeam, which is arranged on the upper end of a support. An upper clamping head and a force sensitive sensor are arranged on the middle of the crossbeam. Two ends of a metal wire are respectively connected to the force sensitive sensor and a lower clamping head. The lower clamping head and a metal frame are fixed together, and an iron block is fixed in the metal frame. An electromagnet device is arranged under the metal frame. A measuring device is composed of a Hall element, a measurement controller, a Hall voltage amplifying device, and a digital oscilloscope. The period of Hall voltage waveform with periodic changes is measured by the digital oscilloscope to obtain the period of a metal wire spring oscillator that performs simple harmonic vibration, and finally the period of metal wire spring oscillator is substituted into a formula to calculate the Young modulus of the metal wire. The provided method is suitable for measuring the Young modulus of a metal wire.
Owner:田凯
Teaching model convenient to observe chemical experiment changes
The invention discloses a teaching model convenient to observe chemical experiment changes. The model comprises an inlet protective cover, a protective shell is fixedly installed below the inlet protective cover, a glass door is fixedly installed on the front surface of the protective shell, a control platform is fixedly installed on the right side of the glass door, an operation rod is fixedly installed on the left side of the front surface of the control platform, a switch is fixedly installed above the operation rod, a button is fixedly installed on the right side of the switch, a PH displayer is fixedly installed above the control platform, a temperature displayer is fixedly installed above the PH displayer, a display screen is fixedly installed on the right side of the control platform, a base is fixedly installed below the display screen, a temperature testing device is fixedly installed on the right side of the interior of the protective shell, a test tube is fixedly installed on the right side of the temperature testing device, and a mechanical clamp is movably installed in the middle of the test tube. The teaching model has the advantages of being simple in structure, convenient and practical, convenient to observe the chemical experiment changes and good in safety performance.
Owner:盛明明
Free falling device based on electromagnetic induction coil and acclamation measurement method
InactiveCN110136550AReduce suctionIncrease diversityEducational modelsGravitational wave measurementConvertersFree falling
The invention discloses a free falling device based on an electromagnetic induction coil and an acclamation measurement method. The device comprises a control base, a wire column and a hollow column are arranged on the control base and provided with a first coil fixing device, a second coil fixing device and a third coil fixing device, and the first coil fixing device, the second coil fixing device and the third coil fixing device are internally provided with a first coil, a second coil and a third coil respectively; a fixing rack is arranged at the top of the hollow column, a button and a magnet exciting coil are arranged on the fixing rack, a magnet is arranged in the magnet exciting coil, an attraction sleeve is connected to the bottom of the magnet, and a steel ball is arranged in theattraction sleeve; the first coil, the second coil and the third coil are connected with a signal amplifier, the signal amplifier is connected with an A / D converter, the A / D converter is connected with the controller, and the controller is connected with a display screen, a timer and the button. According to the device, the acceleration of the steel ball during free falling can be measured, a numerical value is displayed, and the richness of a teaching experiment is improved.
Owner:ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Experimental device and method for measuring Young modulus by virtue of beam bending method according to resonance principle
InactiveCN105954361ARich experimental contentBroaden your mindAnalysing solids using sonic/ultrasonic/infrasonic wavesMaterial strength using steady bending forcesCapacitanceMeasurement device
The invention provides an experimental device and method for measuring Young modulus by virtue of a beam bending method according to a resonance principle and relates to a Young modulus measurement and method. According to the experimental device and the experimental method, the problems that principle of an experiment for measuring the Young modulus by virtue of the beam bending method is single and abstract, and the adjusting difficulty of a telescope is big at present are solved. The experimental device comprises two upright pillars arranged on a base, wherein two ends of a metal beam with a rectangular section are freely bridged above knife edges at the upper ends of the upright pillars, the metal beam is sleeved with a copper framework, a vibration exciter and a metal framework are arranged at the lower end of the metal beam, and the vibration exciter is connected with a signal source; and a measuring device comprises a differential bridge, an alternating voltage source, an amplifier and an oscilloscope, and the differential bridge consists of variable capacitors. According to the experimental method, a sinusoidal signal is converted into mechanical vibration by virtue of the vibration exciter to drive a spring oscillator of the metal beam to do forced vibration, the forced vibration is converted into an electric signal by virtue of the bridge consisting of the variable capacitors, the signal frequency is adjusted, the inherent frequency of the spring oscillator of the metal beam is obtained when the waveform amplitude is maximized, and then the Young modulus is calculated. The experimental device and the experimental method are applicable to the measurement of the Young modulus.
Owner:田凯
Experiment device and method adopting resonance vibration to measure Young modulus of metal wire
InactiveCN106053267ARich experimental contentBroaden your mindEducational modelsMaterial strength using repeated/pulsating forcesPhysicsMeasurement device
Owner:田凯
Experiment apparatus and experiment method for measuring Young's modulus through beam bending method using resonance phenomenon
InactiveCN106248500ABroaden your mindCultivate the spirit of innovationMaterial strength using steady bending forcesYoung's modulusVibration exciter
The experimental device and method for measuring Young's modulus by the beam bending method using the resonance phenomenon relates to a Young's modulus measuring device and method. Difficult question. The device of the present invention includes setting two columns on the base, the two ends of the metal beam with rectangular cross-section are freely straddled on the knife edge of the upper end of the column, a copper frame is placed on the metal beam, and a vibration exciter, an iron block and a vibration picker are arranged at the lower end , the exciter can be connected with the frequency sweeper and the sinusoidal signal source respectively, and the vibration pick-up can be connected with the frequency sweeper and the amplifier respectively; the method of the present invention utilizes the exciter to convert the sinusoidal signal into mechanical vibration, so that the metal beam spring vibrator can do For forced vibration, use a frequency sweeper to obtain the approximate value of the resonance frequency through the amplitude-frequency characteristic curve of the metal beam spring vibrator, use a sinusoidal signal source and an oscilloscope to further accurately determine the resonance frequency, and obtain Young's modulus. The invention is applicable to the measurement of Young's modulus.
Owner:田凯
Horizontal projectile motion virtual-real fusion experiment platform and method
InactiveCN112309207AEfficient use ofLow environmental requirementsImage analysisDrawing from basic elementsCamera imageComputer graphics (images)
The invention discloses a horizontal projectile motion virtual-real fusion experiment platform which comprises a horizontal projectile motion instrument, a high-speed camera, a computer and a projector. The invention further discloses a horizontal projectile motion virtual-real fusion method. The method comprises the following steps: S1, enabling the high-speed camera continuously to shoot imagesof falling of a small ball; S2, identifying the images by the computer, and acquiring the position of the small ball in a high-speed camera image coordinate system at each moment; S3, converting the obtained central point position of the small ball in the high-speed camera image coordinate system into the position in the projector image coordinate system by the computer at each moment, and fittingpoints corresponding to each position in the projector image coordinate system into a curve; and S4, projecting the fitted curve to a horizontal projectile motion instrument by the projector, and carrying out virtual-real fusion presentation. On the basis of real experimental equipment and operation, an experiment is expanded on the basis of real experimental data, and virtual presentation is carried out.
Owner:HANGZHOU NORMAL UNIVERSITY
Downhole differential pressure power generation testing device
PendingCN114487659AImprove performanceExtended service lifePiezoelectric/electrostriction/magnetostriction machinesElectrical testingControl engineeringData acquisition
The invention relates to the field of power generation testing devices, and provides an underground differential pressure power generation testing device, which is characterized in that an industrial control all-in-one machine, an indicating instrument, a speed regulation knob and a control switch group are mounted at the upper part of the front side of a differential pressure power generation testing control cabinet, a data acquisition module, a load module and a power supply module are mounted in the middle of the control cabinet, and a mechanical energy conversion device is mounted at the lower part; the mechanical energy conversion device is sequentially connected with the piezoelectric assembly, the conversion circuit and the load module; various data are monitored in real time, the collected data are accurate and detailed, the data are firstly stored and then analyzed, a curve trend is automatically generated, and summarization, comparison and analysis are facilitated; computer programmed control is adopted, operation is accurate and high in reliability, and labor is saved; underground working condition power generation is simulated, and real and accurate data are provided for production equipment; the power generation device works stably and is long in service life; the performance is reliable, the maintenance is less, and long-time work under severe environment can be realized; the device is simple, easy to operate, visual in experimental phenomenon and safe to operate.
Owner:DONGYING FLUID SCI & TECH
Experimental device and method for measuring Young modulus through beam bending method on basis of resonance principle
InactiveCN106092790ARich experimental contentBroaden your mindEducational modelsMaterial strength using repeated/pulsating forcesVibration amplitudeLight spot
The invention provides an experimental device and method for measuring Young modulus through a beam bending method on the basis of a resonance principle, and relates to a Young modulus measuring device and method. The invention aims at solving the problems that an existing experiment principle for measuring the Young modulus through the beam bending method is single and abstract, and a telescope is difficult to adjust. According to the experimental device, two stand columns are arranged on a base, the two ends of a metal beam with a rectangular cross section are freely arranged on cutting edges at the upper ends of the stand columns in a crossing mode, the metal beam is sleeved with a copper frame, the lower end of the copper frame is provided with a vibration exciter and an iron block, the vibration exciter is connected with a signal source, and a laser is arranged on a scaleplate. According to the experimental method for measuring the Young modulus through the beam bending method on the basis of the resonance principle, a sinusoidal signal is converted into mechanical vibration by means of the vibration exciter, a metal beam spring oscillator is subjected to forced vibration, the vibration enables light spots formed on the scaleplate by reflecting a laser beam through a plane mirror of an optical lever to rotate by means of an amplification system composed of the laser and the optical lever, the signal frequency is adjusted, the inherent frequency of the metal beam spring oscillator is obtained when the vibration amplitude is the largest, and the Young modulus is calculated out. The experimental device and method for measuring the Young modulus through the beam bending method on the basis of the resonance principle are suitable for measuring the Young modulus.
Owner:田凯
Experimental device and method for measuring Young modulus through beam bending method achieving simple harmonic vibration
InactiveCN106092789ARich content of physical experimentsRich experimental contentEducational modelsMaterial strength using repeated/pulsating forcesElectrical resistance and conductanceMeasurement device
The invention relates to a device and method for measuring the Young modulus, in particular to an experimental device and method for measuring the Young modulus through a beam bending method achieving simple harmonic vibration. The device and method are used for solving the problems that the experiment principle of the beam bending method for measuring the Young modulus in the current college physics experiment is single and abstract, and telescope adjusting difficulty is large. According to the device, two stand columns are arranged on a base, the two ends of a rectangular section metal beam are freely arranged on tool edges at the upper ends of the stand columns in a striding mode, the metal beam is sleeved with a copper frame, a force sensor and a metal frame with an iron block fixed inside are arranged at the lower end of the metal beam, an electromagnet device is arranged below the metal beam, and the device for measuring the Young modulus is composed of a differential bridge composed of four magnetoresistors, an adjustable alternating-current voltage source, a voltage amplification device, a digital oscilloscope and the like. According to the method, the period of the periodical change bridge output voltage waveform is measured through the digital oscilloscope, and the simple harmonic vibration period of a metal beam spring oscillator is obtained and substituted into a formula to calculate the Young modulus of a metal material. The device and method are suitable for measuring the Young modulus.
Owner:田凯
Demonstration and calculation device and method of Coriolis acceleration based on physical simulation form
ActiveCN104835388BHigh measurement accuracyEasy to recordEducational modelsKinematicsRelative motion
Owner:CHANGCHUN UNIV OF TECH
Experimental device and method for testing Young modulus through suspending fiber coupling flexural resonance method
InactiveCN106248798AEasy to observeEasy to measureAnalysing solids using sonic/ultrasonic/infrasonic wavesYoung's modulusVibration exciter
The invention relates to a Young modulus measuring device and method, in particular to an experimental device and method for testing Young modulus through a suspending fiber coupling flexural resonance method. The device and method aim at solving the problems that in an existing dynamic Young modulus measuring method in a physical test, material heating is not uniform, and resonant frequency estimation is inconvenient are solved. The device comprises a stainless steel water tank which contains heat conduction liquid and is arranged on a base, a sample bar to be tested is suspended below a vibration exciter and a vibration pickup through thin wires, the vibration exciter can be connected with a sweep generator and a sine signal source, and the vibration pickup can be connected with the sweep generator and an amplifier. The temperature of the heat conduction liquid, namely, the sample bar is changed through a temperature controller, the sample bar is heated uniformly, the sweep generator is utilized for obtaining the approximate value of resonant frequency through the amplitude-versus-frequency curve of the sample bar, the resonant frequency is further precisely determined through the sine signal source and an oscilloscope, and the Young modulus of the sample bar material can be obtained by substituting the resonant frequency into a formula. The device and method are used for measuring the Young modulus.
Owner:HUANGHE S & T COLLEGE
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