43results about How to "The experimental phenomenon is intuitive" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention provides an experiment device and method adopting resonance vibration to measure the Young modulus of a metal wire, relates to a Young modulus measuring device and method, and aims to solve 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. A measuring device is composed of a differential bridge composed of four magnetic sensitive resistors, an adjustable alternating voltage source, a voltage amplifying device, and a digital oscilloscope. The period of voltage waveform output by the differential bridge with periodic changes is measured by the digital oscilloscope to obtain the period of a metal wire spring oscillator that performs simple resonance vibration. The period of the 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.

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.

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.

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.

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.

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.