43results about How to "Easy to adjust brightness" patented technology

The invention discloses a method and a device for regulating screen brightness and a mobile terminal, wherein the device for regulating screen brightness comprises a data interface and a brightness regulator. The data interface is suitable for receiving distance data collected by a distance sensor, wherein the distance data indicate the distance between the distance sensor and an obstruction. The brightness regulator is suitable for judging whether the distance data collected within a predetermined duration is less than a distance threshold constantly. When determining that the distance data within the predetermined duration is less than the distance threshold constantly, the operations of regulating screen brightness is performed based on the current screen brightness. The operations of regulating screen brightness include reducing the screen brightness when the current screen brightness is highest, and raising the screen brightness when the current screen brightness is lowest. When the current screen brightness is higher than a brightness threshold and not highest, the screen brightness is raised. When the current screen brightness is lower than the brightness threshold and not lowest, the screen brightness is reduced.

The invention relates to a dimming display device, which comprises a control module, a plurality of backlight modules, a display screen and a plurality of temperature detection modules, wherein the display screen includes a plurality of display areas; each display area corresponds to one of the backlight modules and each display area is provided with at least one of the temperature detection modules; the control module comprises a signal detection module, a dimming module, a PWM driving module and a controller; the signal detection module is connected to the various temperature detection modules; the signal detection module is connected to the controller; the controller is connected to the dimming module; and the dimming module is connected to the plurality of backlight modules by virtue of the PWM driving module. In accordance with temperture detected by the temperature detection modules, dimming parameters are generated, and subsequently, the PWM driving module is controlled to drive the backlight modules to work in accordance with the dimming parameters, so that the brightness of the display screen is regulated more conveniently; and in addition, since light emitting of the backlight modules is matched with temperatures of the corresponding display areas, the circumstance that the display screen is locally excessively high in temperature is effectively avoided, so that energy consumption is effectively reduced.

The invention relates to an intelligent lighting control management system and method. The invention relates to the technical field of lighting control. The problem that workers need to adjust the light brightness of lighting devices in the same area one by one in an application scene requiring the brightness of the lighting devices in the same area to be kept consistent is solved. The system comprises a first database in which areas and preset light brightness of lighting devices located in the corresponding areas in different time periods are stored, power supply modules which are arranged on the lighting devices to supply power to the corresponding lighting devices, node dimmers which are controlled by a control terminal to control the intensity of current output to the lighting devicesby the power supply modules so as to adjust the brightness of the lighting devices, and the control terminal which is used for information interaction acquisition, information analysis and judgment and device control. According to the invention, synchronous intelligent brightness control of all lighting devices in the same area can be realized, and the trouble of manually adjusting the brightnessof the lighting devices one by one is reduced.

The invention discloses a telescopic electric torch with the conveniently-adjusted luminance. The telescopic electric torch comprises a torch body (1). A connecting base (2) is arranged at the lower end of the torch body (1). Focusing threads (3) are arranged on the connecting base (2). A plurality of transparent sheets (4) are connected to the outer edge of the lower end of the connecting base (2), and the transparency of the transparent sheets (4) is different. Fixing threads (5) are arranged at the lower end of the corresponding transparent sheet (4). A lamp bead (6) is arranged in the transparent sheets (4). A lampshade (7) is connected to the outer side of the connecting base (2). Inner threads are arranged at the top end of the inner side of the lampshade (7). A lens (8) is connected to the middle of the lower end of the lampshade (7). A light reflection cover (9) is connected to the upper portion of the lens (8). A light reflection sheet (10) is arranged on the light reflection cover (9). Through holes (11) are formed in the middle of the light reflection sheet (10) and the middle of the light reflection cover (9). The telescopic electric torch has the advantages of being large in illuminating range and wide in application range, the luminance can be conveniently adjusted, and use is convenient.

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.

The invention provides an external shading combination window, which includes a combination window frame, a built-in window sash installed on the inner side of the combination window frame and a shutter installed on the outer side of the combination window frame. The shutter includes shutter transverse frames, shutter mullions and louvers enclosed in the shutter transverse frames and the shutter mullions, the shutter can be divided into upper and lower sections which are hinged, the upper section can be stretched out and lifted up at a certain angle, and the lower section can be bent downwards. The advantages of firm and reliable structure and high safety are achieved, and the window can further be used in high-rise buildings; the shaded effect is good, the advantages of the shutter and the structure for shading through stretching out and lifting up are integrated, flat shading is easily realized, the form of shading through stretching out and lifting up can facilitate adjustment of the brightness and line of sight of the external shading combination window, and the advantages of both ventilation and shading are achieved while a built-in window is opened; and burglary prevention can be achieved when the shutter is closed, and the shutter can be used as a fire-fighting escape way when stretching out.

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.

The invention provides an auxiliary experiment device for measuring the radius of the curvature of a lens through a Newton ring. According to the device, eight LED monochromatic light sources with different wave lengths are adopted, light emitted by the light sources is coupled into a light guide fiber, and an outlet is provided with a beam expanding lens and frosted glass. A CCD camera is arranged in front of an eye lens of a reading microscope, the CCD camera is connected with a displayer through an interface, and the Newton ring can be directly displayed on the displayer. The LED monochromatic light sources with different wave lengths are turned on and used as incident light sources of an experiment, a Newton ring device is lightened after the light is reflected by a semi-reflective mirror, the Newton ring is displayed on the displayer through the CCD camera, and measurement can be conducted by using the reading microscope. According to the auxiliary experiment device, LEDs are used as the monochromatic light sources, the service life is long, preheating is not needed when experiments are conducted, lightness adjustment is convenient, eight monochromatic lights with different wave lengths can be obtained, the experiments are rich in content, student data are not prone to being similar, the Newton ring is directly displayed on the displayer through the CCD camera to be observed and measured, convenience is brought, and effort is saved.

The invention relates to the technical field of lighting, in particular to an intelligent lighting control system for a stadium, which comprises a plurality of independent lighting lamp groups, a clock-in terminal and a server, and is characterized in that the lighting lamp groups are arranged above exercise equipment and are electrically connected with the server; and the clock-in terminal is arranged on exercise equipment and is used for collecting clock-in information of a user and sending the clock-in information to the server. The server comprises an equipment use statistics module used for performing statistics on the use condition of each exercise equipment according to the clock-in information in a set first time period; an illuminating lamp group control module used for controlling on and off of an illuminating lamp group corresponding to the exercise equipment according to the control strategy; an equipment wear prediction module used for predicting a first wear degree and a second wear degree; and an equipment position adjusting module used for generating equipment position adjusting information according to the first wear degree and the second wear degree. The problems of low lighting efficiency and waste of electric energy caused by the existing control mode of the lighting lamp groups in the stadium are solved.

The invention discloses an intelligent electric bicycle display instrument, which comprises a shell, an LED display screen body, a mounting plate and a cover body. An electricity meter is arranged atone end of one side of the shell. A USB interface is arranged on the shell below the coulombmeter; a left steering lamp is arranged at one end of the coulombmeter on one side of the shell; a headlampbutton is arranged on the side, away from the coulombmeter, of the left steering lamp. A right steering lamp is arranged on the side, away from the left steering lamp, of the headlamp button, an LED display screen is arranged on the portion, below the right steering lamp, of the shell, a brightness sensor is arranged on the side, away from the headlamp button, of the LED display screen, and a solar cell panel is arranged at the other end of one side of the shell. By installing the GPS positioner, the single-chip microcomputer and the wireless signal receiving and transmitting module, the GPS positioner sends position signals of the instrument to the single-chip microcomputer and sends the position signals to the wireless signal receiving and transmitting module through the single-chip microcomputer, the position of the instrument can be known conveniently at any time, and the situation of loss is avoided.

The invention provides a head lamp, belonging to the technical field of illuminating equipment and solving the problem of bad radiating performance in the existing head lamp. The head lamp comprises a shell and a rear seat provided with belt holes, wherein the shell is arranged on the rear seat and is internally provided with an LED (light-emitting diode) light-emitting device and a power supply device matched with the LED light-emitting device; the LED light-emitting device is contained in a cup-shaped radiating seat; the radiating seat is prepared from the following materials by a casting process in percentage by weight: 5.1%-12.5% of silicon, 0.3%-0.72% of iron, 0.1%-0.4% of copper, 0.12%-0.36% of magnesium, 0.15%-5% of manganese, 0.25%-3.6% of zinc, 0.2%-0.3% of titanium and the balance of aluminium. The head lamp has the advantage of good radiating performance.

The invention discloses a convenient-to-adjust energy-saving lamp. The lamp comprises a lamp holder, a mounting shell is connected to the top of the lamp holder through bolts, an LED energy-saving lamp body is connected to the outer wall of one side of the mounting shell through bolts, a rotating motor is connected to the inner wall of the top of the mounting shell through bolts, an output shaft of the rotating motor is connected with a rotating plate through a bolt, the circumference of the bottom of the rotating plate is connected with a dimming cover through bolts, the dimming cover is of acylindrical structure formed by splicing arc-shaped pieces with the same size, the transparency of the arc-shaped pieces is gradually changed from shallow to deep, and the top of the lamp holder is connected with a limiting shell through bolts. When the LED lamp is used, the rotating plate can be driven by the rotating motor to rotate, so that the dimming cover is driven to rotate along with therotating plate, the arc-shaped pieces with different transparency of the dimming cover are conveniently adjusted to be aligned with the LED energy-saving lamp, the light brightness is conveniently adjusted, the limiting shell shields the light of the LED energy-saving lamp, and the light is emitted from a through hole.

The invention discloses a low-position light-emitting diode (LED) lighting device of a tunnel. The device comprises a lamp body sectional material, a glass plate, a light-diffusion type light transmission plate, two end covers, a male plug, a female plug and two buckling covers, wherein the glass plate and the light-diffusion type light transmission plate are positioned in the lamp body sectional material; the two end covers are packaged on two sides of the lamp body sectional material; the male plug and the female plug are connected with the two end covers respectively; the two buckling covers are positioned on the outermost side and connected with two ends of the lamp body sectional material respectively; an LED chip, a reflecting plate, a diffusion plate and a lamp bar plate are arranged in one buckling cover; the lamp bar plate is a printed circuit board (PCB) and arranged on the side part of the LED chip; and the diffusion plate is arranged on the other side, opposite to the lamp bar plate, in the buckling cover. The LED chip is modularized to facilitate adjustment of brightness and an irradiation distance; and the glass plate and the light-diffusion type light transmission plate realize secondary light-changing performance and make a light source diffused. The low-position LED lighting device of the tunnel has the advantages that: the structure is smart; light emitting brightness is high by using the technologies of light emitting of an LED chip module and secondary light changing; glare is avoided; and visual comfortability is improved.

The invention discloses an intelligent household mosquito-repelling table lamp comprising a base, a supporting column is fixedly connected to one side of the base, a lamp holder is fixedly connected to the top of the supporting column, a rotating rod is rotatably connected to the inner side of the lamp holder, and a large gear is fixedly connected to the position, located in the lamp holder, of the surface of the rotating rod; and a small gear is arranged on one side of the large gear, a movable sleeve is fixedly connected to the center of the small gear, a main bevel gear is fixedly connectedto the lower portion of the movable sleeve, and an auxiliary bevel gear is arranged on the side, away from the large gear, of the main bevel gear. The invention relates to the technical field of lamps. With the intelligent household mosquito-repellent table lamp, problems that an existing table lamp is simple in structure and single in function, mosquitoes frequently fly around the table lamp when the table lamp is used at night, illumination of the table lamp and the mood of people are affected, the color and brightness cannot be adjusted, intelligence is low, humanization is not enough, andthe current market requirements are difficult to meet are solved.

The invention discloses a built-in multifunctional reading lamp. The lamp comprises a shell assembly which is provided with an upper shell, a lower shell and a middle hemispherical support; the upper shell is provided with an upper shell bottom wall; the middle hemispherical support is a hemispherical structure with a downward opening, and the top of the middle hemispherical support is fixedly connected with the bottom wall of the upper shell; the lower shell is provided with a lower shell top wall, a lower shell bottom wall and a lower shell side wall between the lower shell top wall and the lower shell bottom wall, the lower shell top wall surrounds the periphery of the bottom edge of the middle hemispherical support, and a hemispherical matching wall is formed upwards from the inner periphery of the lower shell top wall along the middle hemispherical support; and the middle hemisphere support supports the hemisphere matching wall. The reading lamp has the advantages that the lower shell rotates in the horizontal circumferential direction and / or the vertical circumferential direction, and the rotation angle is larger than that of a traditional reading lamp; and a light spot adjusting function is realized.

The invention relates to the technical field of surface-mounted LEDs, and discloses a surface-mounted LED for an outdoor display screen, which solves the problems that the position of an LED lamp cannot be adjusted, the light intensity of a light source cannot be changed, the universality is poor, the LED lamp is inconvenient to disassemble, the operation steps are relatively tedious and the actual use is inconvenient, and comprises a surface-mounted seat and a lamp body, the lamp body is arranged on one side of the mounting base, an LED lamp is arranged at one end of the lamp body, a lampshade is arranged on one side of the mounting base, the lamp body penetrates through the inner wall of one side of the lampshade, a reflector is arranged on the inner wall of the lampshade, a lens is fixedly connected to one side of the lampshade, and an adjustable detachable assembly is arranged between the mounting base and the lampshade for connection. The adjustable dismounting assembly comprises a first threaded pipe arranged on one side of the lampshade; the relative position of the LED lamp and the focus point of the reflector is convenient to change, after adjustment is completed, the position of the lampshade is prevented from being changed, and the lamp body and the LED lamp are convenient to disassemble.

The invention discloses a portable traffic light with a brightness adjustment function in the field of traffic light technologies. The traffic light comprises a fixed box, wherein three groups of signal lights identical in structure are arranged on the periphery of the fixed box, two groups of reflective plates identical in structure are hinged to the periphery of the fixed box, the two groups ofreflective plates are located at the two sides of the three groups of signal lights respectively, the tops of the two groups of reflective plates are all connected with an adjustment device, a movablerod is connected to the middle end of the bottom of the fixed box, the bottom end of the movable rod is inserted into a fixed rod, a fastening bolt is arranged on the upper portion of the front sideof the fixed rod, threaded holes matched with the fastening bolt are uniformly formed in the outer wall of the front side of the movable rod, and a base is arranged at the bottom end of the fixed rod.Through the arrangement of the movable rod, the fixed rod, the fastening bolt and the threaded holes, it is convenient to put the traffic light away, and accordingly the traffic light is convenient to carry; and through the arrangement of mobile wheels, the traffic light is convenient to transport and can be put away when not in use.

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 provides an apparatus for automatically recognizing the cumulative flow number on a flow meter head, and a method thereof. The apparatus comprises an industrial camera, an inductive switch, and a computer that are connected mutually. The industrial camera includes a camera and a fixed base; a damping rotating shaft is connected between the side of the camera and the fixed base; a fixing mechanism is arranged at the rear end of the fixed base; and an auxiliary lighting mechanism is arranged at the front end of the fixed base. The fixing mechanism includes a first bending adjustingrod and a second bending adjustment rod; a telescopic sleeve is connected between the tail end of the first bending adjustment rod and the front end of the second bending adjustment rod; and a fixedclamp is connected to the tail end of the second bending adjustment rod. The auxiliary lighting mechanism includes a third bending adjustment rod; an illumination lamp is arranged at the tail end of the third bending adjustment rod; and a brightness adjustment knob is arranged at the illumination lamp. Therefore, the number displayed by the flow meter is collected conveniently and calculation is carried out conveniently.

The present invention is applicable to the technical field of lamp installation, and provides a building curtain wall lighting lamp installation structure, which includes a curtain wall and a lamp body, and also includes: an adjustment installation component for installing the lamp body on a lamp mounting seat; a fastening component, Set in the cavity opened on the lamp mounting base, the fastening assembly includes a fastening unit matched with each set of external threaded parts and internal threaded parts, and the fastening units include: pressing parts, inclined, One end is slidably inserted into the pressure groove opened on the external threaded part, the other end is connected to the nut seat, and the nut seat is screwed on the screw rod rotatably installed in the cavity; the elastic part is installed in the pressure groove and Located between the end of the pressing part and the bottom of the pressure groove; the building curtain wall lighting lamp installation structure provided by the present invention can perform secondary fastening on the installation between the lamp and the curtain wall, which is convenient for adjusting the brightness and irradiation angle of the light, and Has a protective function.

The invention discloses an adhesive tape, which is a double-sided adhesive tape comprising a laminated base material and adhesive layers (4) provided on both sides of the laminated base material. The laminated base material has a resin film (1) and a black printing layer (3) There is at least one bright-color printing layer (2) in between, characterized in that the above-mentioned black printing layer (3) contains a structure derived from an aromatic isocyanate-based curing agent; the double-sided adhesive tape is difficult to produce laminated substrates Adhesive layer (4) on the side of the light reflection layer is hard to yellow due to blocking and wrinkles, and it is easy to adjust the brightness (reflectivity) of the light reflection layer, so it is useful for fixing the liquid crystal display panel and the backlight unit.

Disclosed is a double-sided pressure-sensitive adhesive tape which comprises: a multilayer substrate that comprises a resin film (1), a black print layer (3), and at least one light-color print layer(2) disposed therebetween; and pressure-sensitive adhesive layers (4) disposed on both surfaces of the multilayer substrate. The pressure-sensitive adhesive tape is characterized in that the black print layer (3) includes a structure attributable to an aromatic isocyanate-based hardener. The multilayer substrate is less apt to suffer blocking or wrinkling, and the pressure-sensitive adhesive layer(4) on the light reflection layer side is less apt to yellow. The lightness (reflectance) of the light reflection layer is easy to regulate. This pressure-sensitive adhesive tape is useful for fixinga liquid-crystal display panel to a backlight unit.

The invention discloses a vehicle music automatic player. The vehicle music automatic player comprises a player main body, wherein a display screen, a plurality of control buttons and a playing opening, a sound-amplifying circular slot is formed in an outer circumference of the playing opening, a plurality of sliding slots are equidistantly formed in an inner cavity of the sound-amplifying circular slot, a sliding block is clamped in each sliding slot, and the sliding blocks are connected with a sound-amplifying cylinder; a plurality of threaded through holes are randomly formed in the surface of the sound-amplifying cylinder; each threaded speaker comprises a truncated cone-shaped sound-amplifying cavity and a threaded cylinder; a sealing device is threaded on a cylinder opening of the sound-amplifying cylinder, the sealing device comprises a screw tube, a sealing membrane a and a sealing membrane b, the sealing membrane a and the sealing membrane b are located at the end parts of the screw tube, and a vibration cavity is formed between the sealing membrane a and the sealing membrane b, and multicolor powders are filled in the vibration cavity. Due to the whole design of the vehicle music automatic player, the music can be amplified in the vehicle, and meanwhile, a stereo surrounding sound effect can generate so as to create a comfortable driving environment; furthermore, due to vibration of the multicolor powders, the music can be visualized, which has very strong visual impression.

The invention relates to the technical field of silicon wafer detection, and discloses a silicon wafer detection device. The silicon wafer detection device comprises a conveying unit, an acquisition part, an infrared light source and adjusting assemblies. The conveying unit is used for conveying silicon wafers in a conveying direction; the acquisition part and the infrared light source are respectively arranged on two sides, perpendicular to the conveying direction, of the conveying unit, and light rays emitted by the infrared light source can penetrate through the silicon wafers and then reach the acquisition end of the acquisition part; the number of the adjusting assemblies is two, the two adjusting assemblies are connected to the acquisition part and the infrared light source respectively, and the adjusting assemblies can adjust the angle of the acquisition part or the infrared light source. According to the invention, the adjustment range of the relative angle between the acquisition part and the infrared light source is expanded, the imaging effect is ensured, the clear degree of defects such as subfissure on the silicon wafers on acquired images is improved, and the accuracy of a detection result is ensured.

The present invention relates to an intelligent lighting control management system and method, and relates to the technical field of lighting control, which solves the problem that when encountering these application scenarios that need to keep the brightness of lighting equipment in the same area consistent The problem of adjusting the light brightness of the equipment one by one, which includes the first database that stores the preset light brightness of the area and the lighting equipment located in the corresponding area at different time periods, and the power supply that is set at each lighting equipment to supply power to the corresponding lighting equipment The module, the node dimmer controlled by the control terminal to control the current intensity output from the power supply module to the lighting equipment so as to adjust the brightness of the lighting equipment, and the control terminal used for information interaction acquisition, information analysis and judgment, and equipment control . The invention can realize the synchronous intelligent brightness control of all the lighting devices in the same area, and reduces the trouble of artificially adjusting the brightness of the lighting devices one by one.

The invention discloses an experiment device and method for measuring the Young modulus of a metal wire based on a resonance principle, 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 provided device comprises a crossbeam, which is arranged on the upper end of a support. A platform is arranged on the middle of the crossbeam. Two ends of a metal wire are respectively connected to a vibration generator and an iron block. The vibration generator is connected to a signal source. A laser device is arranged on a scale. The sinusoidal signals are converted into mechanical vibration by the vibration generator so as to force a metal wire spring oscillator to vibrate, the vibration is amplified by an amplification system, which is composed of a laser device and an optical lever, through the vibration, the laser beams are reflected by the flat mirror of the optical lever to form light spot vibration on the scale, the signal frequency is adjusted, when the vibration amplitude is the largest, the inherent frequency of the metal wire spring oscillator can be obtained, and the inherent frequency is substituted into a formula to calculate the Young modulus. The provided method is suitable for measuring the Young modulus of a metal wire.

The invention discloses a three-primary color experiment box of light for physics. The three-primary color experiment box includes a shell, the bottom of the shell is provided with a coupling sleeve, the bottom of the coupling sleeve is provided with landing legs, the bottoms of the landing legs are connected with universal wheels, the shell is internally provided with a first electric push rod, a second electric push rod and a third electric push rod in sequence, the tops of the first electric push rod, the second electric push rod and the third electric push rod are connected with light guiding covers, a first light emitting diode, a second light emitting diode and a third light emitting diode are installed in the light guiding covers, side walls in the shell are covered with white curtains, the right side in the shell is equipped with an optical screen, the light guiding covers directly face the optical screen, the left side in the shell is equipped with a storage battery, the top in the shell is provided with a camera body, the top of the shell is equipped with a control box and a display, the camera body is electrically connected to the display, and the three-primary color experiment box of light for physics is suitable for wide popularization.

The invention discloses a multifunctional student bed, which comprises bed legs, a bed board is arranged on the upper end of the bed board, a backrest is arranged on one side of the upper end of the bed board, and an electric rotating shaft is arranged above the side end of the backrest. The electric rotating shaft is provided with a pole, the pole is provided with a lampshade, the interior of the lampshade is provided with an LED light, and the surface of the backrest is provided with a clock, and the right side of the clock is provided with an alarm bell. The right side of the alarm bell is provided with an LED light control switch, the right side of the LED light control switch is provided with an electric shaft control button, and the right side of the electric shaft control button is provided with an LED light brightness control button, and the A controller is arranged inside the backrest, and the controller is electrically connected with an external power supply. The beneficial effect of the invention is that the height and brightness of the LED lights are adjusted to facilitate students to study in bed at night, the clock facilitates students to know the time, and the alarm reminds students to be early and not late for school.