CN212460923U - Buoyancy comprehensive experiment instrument - Google Patents
Buoyancy comprehensive experiment instrument Download PDFInfo
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- CN212460923U CN212460923U CN202021692164.2U CN202021692164U CN212460923U CN 212460923 U CN212460923 U CN 212460923U CN 202021692164 U CN202021692164 U CN 202021692164U CN 212460923 U CN212460923 U CN 212460923U
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Abstract
The utility model relates to an experimental apparatus technical field especially relates to a buoyancy comprehensive experiment appearance, including support crossbeam, two support stands, two type of falling T support bases, displacement chi mount pad, displacement chi locking jackscrew, digital display displacement chi, force sensor, couple, displacement display screen, force display screen, pressure gauge base, pressure sensor, pressure gauge tray, pressure display screen, calculation result display screen, automatically controlled box, excessive drinking cup and fixed pulley. The instrument has comprehensive functions, and most problems of buoyancy and density contents can be solved through experiments.
Description
Technical Field
The utility model relates to an experimental apparatus technical field especially relates to a buoyancy comprehensive experiment appearance.
Background
Buoyancy is a very versatile physical quantity by which we can solve many problems. Such as solving for the liquid density ρLiquid for treating urinary tract infectionDensity of object ρArticle (A)Volume of object VArticle (A)Water discharge mRow boardAnd the like. Buoyancy is the comprehensive application of the mechanics part of junior middle schools, and is the central link of many knowledge. Knowledge points and exercises related to buoyancy are relatively comprehensive, and students feel relatively high difficulty. In recent years, the difficulty of buoyancy is gradually reduced according to the requirements of lessons, but most of the first three students still talk about 'floating' color change. The reason is mainly that the situation in the buoyancy problem is relatively abstract and inconvenient for students to construct. In general experiments, the measurement of the buoyancy is completed by at least 2 steps, so that students cannot conveniently think about the equivalent relation of the buoyancy. The existing instrument in a laboratory can not comprehensively measure the relation of buoyancy, tension and gravity quantitatively, a spring tension meter, an electronic scale or a digital display tension meter on the market is mostly adopted in the patent technology, no numerical display screen or small display brightness of the screen is insufficient, and an ordinary liquid crystal screen can not enable students to see the experiment result. The prior art scheme does not have the function of simultaneously measuring the tension and the pressure and displaying the calculation result.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of above-mentioned technique, and provide a buoyancy comprehensive experiment appearance.
The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: the utility model provides a buoyancy comprehensive experiment appearance which characterized in that: the device comprises a support cross beam, two support stand columns, two inverted T-shaped support bases, a displacement ruler mounting base, a displacement ruler locking jackscrew, a digital display displacement ruler, a tension sensor, a hook, a displacement display screen, a tension display screen, a pressure gauge base, a pressure sensor, a pressure gauge tray, a pressure display screen, a calculation result display screen, an electric control box, a water overflowing cup and a fixed pulley; the two support stand columns and the two inverted T-shaped support bases are vertically installed in a sleeve structure, and the height of the support is positioned by the support stand columns and the support lifting locking screws; the digital display displacement ruler is vertically arranged on the support cross beam through a displacement ruler mounting seat, the digital display displacement ruler moves up and down along the displacement ruler mounting seat and is locked by a jack screw locking position through the displacement ruler, and the depth position of the displacement ruler is displayed by a displacement display screen arranged on the support cross beam; the tension sensor is arranged at the lower end of the digital display displacement ruler, the hook is arranged at the lower end of the tension sensor, and the tension on the hook is displayed through the tension display screen; the pressure sensor is arranged between the pressure gauge base and the pressure gauge tray, and the pressure sensor, the pressure gauge base and the pressure gauge tray form a whole, are separated from the bracket and independently move; the pressure gauge tray is displayed through a pressure display screen; one of the support upright columns is provided with an electric control box, the electric control box is provided with a calculation result display screen, and a calculation result is displayed through a switching function button; the fixed pulley is arranged in the overflow cup, the overflow tube is arranged at the upper part of the overflow cup, the lifting platform is positioned at one side of the overflow cup, the measuring cylinder is arranged on the lifting platform, and the upper part of the measuring cylinder is positioned below the overflow tube.
Preferably, the tension display screen, the pressure display screen and the calculation result display screen are highlight nixie tube display screens respectively, the display size of each screen is not less than 72mm wide and 37mm high, the three display screens are all installed on the electronic control box, and the three display screens are provided with zero clearing buttons respectively.
Preferably, the electric control box switch controls the sensors and the power supplies of the three display screens, and the total power supply is accessed from the power supply input jacks.
Preferably, the overflow cup is a transparent cup with an overflow pipe at the upper part.
Has the advantages that: 1. the instrument has comprehensive functions, and most problems of buoyancy and density contents can be solved through experiments.
2. The application of the sensor and the large-screen high-brightness digital display screen can make experimental data visible for students in a classroom, and is suitable for classroom demonstration of teachers.
3. The support can go up and down, falls down when carrying and reduces the volume, conveniently sets up the height according to the experiment needs during the use.
4. The pressure measurement module and the support are designed separately, the pressure measurement module can be freely moved according to experimental needs, and the height of a container on the pressure measurement module can be unlimited.
5. The digital display displacement ruler can be used for vertically and accurately placing the physical object into liquid and quantitatively displaying the depth of the physical object entering water.
6. The calculation result display function is that the tension display screen can directly display the gravity of an object, the pressure display screen can display the buoyancy of the object, the third display screen has two functions, the first function is that the numerical values on the tension display screen and the pressure display screen can be visually displayed, and the Archimedes principle can be better verified. The second function is to add the numerical values on the tension display screen and the pressure display screen and then divide the numerical values on the pressure display screen, so that the density of the heavy object can be calculated conveniently.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
Spatially relative terms such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe the spatial relationship of one feature or characteristic to another feature or characteristic as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The utility model discloses the structure of furred ceiling is shown in FIG. 1, a buoyancy comprehensive experiment appearance, its characterized in that: the device comprises a support beam 1, two support columns 2, two inverted T-shaped support bases 3, a displacement ruler mounting base 5, a displacement ruler locking jackscrew 6, a digital display displacement ruler 7, a tension sensor 8, a hook 9, a displacement display screen 10, a tension display screen 11, a pressure gauge base 12, a pressure sensor 13, a pressure gauge tray 14, a pressure display screen 15, a calculation result display screen 16, an electronic control box 23, an overflow cup 24 and a fixed pulley 25; the two support upright posts 2 and the two inverted T-shaped support bases 3 are vertically installed in a sleeve structure, and the height of the support is positioned by the support upright posts 2 and the support lifting locking screws 4; the digital display displacement ruler is vertically arranged on the support cross beam through a displacement ruler mounting seat, the digital display displacement ruler moves up and down along the displacement ruler mounting seat and is locked by a jack screw locking position through the displacement ruler, and the depth position of the displacement ruler is displayed by a displacement display screen arranged on the support cross beam; the displacement display screen 8 has a switch, a unit switching button 17, and a clear button 18. The tension sensor is arranged at the lower end of the digital display displacement ruler, the hook is arranged at the lower end of the tension sensor, and the tension on the hook is displayed through the tension display screen; the pressure sensor is arranged between the pressure gauge base and the pressure gauge tray, and the pressure sensor, the pressure gauge base and the pressure gauge tray form a whole, are separated from the bracket and independently move; the pressure gauge tray is displayed through a pressure display screen; one of the support upright posts is provided with an electric control box, the electric control box is provided with a switch 21, the electric control box is provided with a calculation result display screen, the display size of each screen of the calculation result of (tension + pressure) or [ (tension + pressure)/pressure ] can be displayed by switching a (tension + pressure) display button 19 and a [ (tension + pressure)/pressure ] display button 20, the width is 72mm and the height is 37mm, the three display screens are all arranged on the electric control box, and the three display screens are respectively provided with a zero clearing button; both the tension sensor and the pressure sensor are provided with a mass (gram or kilogram)/force (Newton) unit switching function button. The electric control box switch controls the sensors and the power supplies of the three display screens, and the main power supply is connected from the power supply input jack 22.
The fixed pulley is arranged in the overflow cup, the overflow tube is arranged at the upper part of the overflow cup, the lifting platform 26 is positioned at one side of the overflow cup, the measuring cylinder 27 is arranged on the lifting platform, and the upper part of the measuring cylinder is positioned below the overflow tube.
Application method
1. Measuring buoyancy to objects having a density greater than that of water
The method comprises the following steps of firstly resetting the tension display screen, hanging an object connected with a thin line on a hook of the tension sensor, and measuring the gravity of the object. Then a pulley overflow cup (or other transparent cup) is placed on the pressure gauge tray and the pressure display screen is cleared. The object is slowly immersed into the water by changing the height of the digital display displacement ruler, and the numerical value displayed on the pressure display screen is the buoyancy force borne by the object. And slightly stopping at different positions to observe the measurement results of the tension and the pressure, and verifying whether the tension and the buoyancy (namely the pressure) are equal to the physical gravity.
2. Method for measuring buoyancy of object with density less than water by falling object method
The pulley overflow cup is placed on a pressure gauge tray, the lower edge of an object A with the density smaller than that of water is connected with an object B with the density larger than that of water through a thin wire, the upper edge of the object A is hung on a hook of a tension meter through the thin wire, the object B is completely immersed in the water, the object A is in the air, and the pressure sensor is reset. And completely immersing the object A into the water, paying attention to the fact that the object B does not touch the cup bottom, and obtaining the value on the pressure display screen after the stability, namely the buoyancy of the object A with the density smaller than that of the water.
3. Experiment of Archimedes principle
Archimedes' law: an object immersed in a stationary fluid is subjected to a buoyant force equal in magnitude to the weight of the fluid displaced by the object. I.e. FFloating body＝GWater (W)。
Placing the pulley overflow cup on a lifting platform, hanging an object on a hook of a tension sensor, and recording the value F of the tension sensorDrawing 1I.e. the weight of the object. The measuring cylinder is placed on the pressure gauge tray, water is injected into the pulley overflow cup until the water overflows into the measuring cylinder, the water in the measuring cylinder is poured out and wiped dry, the measuring cylinder is placed back on the pressure gauge tray again, and then the pressure display screen is cleared. The object is completely immersed in the water overflowing from the pulley cup, the measuring cylinder is used for receiving the water overflowing from the pulley cup, and the numerical value displayed by the pressure display screen is the weight G of the water overflowing from the pulley cupWater (W). The function of the calculated terahertz screen is switched to display (tension + pressure), and F when the object is completely immersed is foundDrawing 2+GWater (W)＝FDrawing 1。
5. Profiling buoyancy variation process
And clearing the pressure display screen. The self-made simple submarine formed by the small bottle and the injector is placed in the pulley overflow cup, and the numerical value on the pressure display screen can not be changed no matter how the depth of the submarine is changed after the submarine is completely immersed in water. Thus verifying that the object is completely submerged and that its buoyancy is independent of depth.
6. Measuring density of submerged objects
An object is hung on a hook of the digital display displacement ruler, and the weight of the object displayed on the tension display screen is marked as GArticle (A). The overflow cup is placed on the pressure gauge tray, and the pressure display screen is reset. By adjusting the height of the digital display displacement ruler, the object is slowly and completely immersed in the water, and the pressure display screen displays the buoyancy FFloating bodyThe display number of the tension display screen is the difference G between gravity and buoyancy1＝GArticle (A)-FFloating bodyBuoyancy equal to the gravity of the drained water, i.e. F, obtained by Archimedes' principleFloating body＝GWater (W)＝ρWater (W)gVRow boardThe volume of the drained water is equal to the volume of the object, and when the object is completely immersed, V isRow board＝V Article (A)Thus having VArticle (A)＝FFloating body/(ρWater (W)g) According to GArticle (A)＝mg＝ρArticle (A)gVArticle (A)And finishing the formula to obtain
ρArticle (A)＝GArticle (A)/gVArticle (A)＝(G1+FFloating body)ρWater (W)/FFloating body＝[(G1+FFloating body)ρWater (W)/FFloating body]ρWater (W)
Thus, the density of water can be considered to be 1 x 103kg/m, switching the display screen of the calculated result to [ (tension + pressure)/pressure ]]Display status with unit of 103kg/m3The result is the density of the measured object.
6. Rendering scenes of physical problems to aid learning in building difficult problems
The depth measuring device on the experimental instrument can help students to reproduce the following physical situation, help students solve the problem of model reproduction, and break through the difficulty of student construction.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The utility model provides a buoyancy comprehensive experiment appearance which characterized in that: the device comprises a support cross beam, two support stand columns, two inverted T-shaped support bases, a displacement ruler mounting base, a displacement ruler locking jackscrew, a digital display displacement ruler, a tension sensor, a hook, a displacement display screen, a tension display screen, a pressure gauge base, a pressure sensor, a pressure gauge tray, a pressure display screen, a calculation result display screen, an electric control box, a water overflowing cup and a fixed pulley; the two support stand columns and the two inverted T-shaped support bases are vertically installed in a sleeve structure, and the height of the support is positioned by the support stand columns and the support lifting locking screws; the digital display displacement ruler is vertically arranged on the support cross beam through a displacement ruler mounting seat, the digital display displacement ruler moves up and down along the displacement ruler mounting seat and is locked by a jack screw locking position through the displacement ruler, and the depth position of the displacement ruler is displayed by a displacement display screen arranged on the support cross beam; the tension sensor is arranged at the lower end of the digital display displacement ruler, the hook is arranged at the lower end of the tension sensor, and the tension on the hook is displayed through the tension display screen; the pressure sensor is arranged between the pressure gauge base and the pressure gauge tray, and the pressure sensor, the pressure gauge base and the pressure gauge tray form a whole, are separated from the bracket and independently move; the pressure gauge tray is displayed through a pressure display screen; one of the support upright columns is provided with an electric control box, the electric control box is provided with a calculation result display screen, and a calculation result is displayed through a switching function button; the fixed pulley is arranged in the overflow cup, the overflow tube is arranged at the upper part of the overflow cup, the lifting platform is positioned at one side of the overflow cup, the measuring cylinder is arranged on the lifting platform, and the upper part of the measuring cylinder is positioned below the overflow tube.
2. The buoyancy comprehensive experimental instrument according to claim 1, characterized in that: the tension display screen, the pressure display screen and the calculation result display screen are highlight nixie display tube display screens respectively, the display size of each screen is not less than 72mm in width and 37mm in height, the three display screens are all installed on the electric control box, and the three display screens are provided with zero clearing buttons respectively.
3. The buoyancy comprehensive experimental instrument according to claim 1, characterized in that: the electric control box switch controls the sensors and the power supplies of the three display screens, and the main power supply is connected from the power supply input jack.
4. The buoyancy comprehensive experimental instrument according to claim 1, characterized in that: the overflow cup is a transparent cup with an overflow pipe on the upper part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021692164.2U CN212460923U (en) | 2020-08-14 | 2020-08-14 | Buoyancy comprehensive experiment instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021692164.2U CN212460923U (en) | 2020-08-14 | 2020-08-14 | Buoyancy comprehensive experiment instrument |
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| Publication Number | Publication Date |
|---|---|
| CN212460923U true CN212460923U (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021692164.2U Active CN212460923U (en) | 2020-08-14 | 2020-08-14 | Buoyancy comprehensive experiment instrument |
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| CN (1) | CN212460923U (en) |
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