CN110782748A - Gravity acceleration testing arrangement for physics experiments - Google Patents
Gravity acceleration testing arrangement for physics experiments Download PDFInfo
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- CN110782748A CN110782748A CN201911237929.5A CN201911237929A CN110782748A CN 110782748 A CN110782748 A CN 110782748A CN 201911237929 A CN201911237929 A CN 201911237929A CN 110782748 A CN110782748 A CN 110782748A
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- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
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Abstract
The invention discloses a gravity acceleration testing device for physical experiments, which belongs to the technical field of physical experiments and comprises a fixed base, wherein a falling box is installed on the left side of the upper end of the fixed base, a supporting column is installed on the right side of the upper end of the fixed base, a limiting plate is installed in the middle of the bottom end of the supporting column, a fixed photoelectric timer is installed on the left side of the limiting plate, a straight rack is arranged at the right end of the supporting column, a lifting sleeve is connected to the top end of the supporting column through a lifting spring, a driving shell is installed at the lower end of the right side of the lifting sleeve, a rotating shaft is installed between the front inner wall and the rear inner wall of the driving shell, a gear matched. According to the invention, the rapid and accurate adjustment of the upper height and the lower height of the placing groove is realized, so that the change of the initial position during the gravity acceleration measurement is realized, and the distance between the movable photoelectric sensors can be adjusted, thereby further increasing the difference change of the data.
Description
Technical Field
The invention relates to the technical field of physical experiments, in particular to a gravity acceleration testing device for physical experiments.
Background
Experiment, refers to one of the basic methods of scientific research. According to the purpose of scientific research, the external influence is eliminated as much as possible, main factors are highlighted, and a research object is artificially controlled or simulated by using special instruments and equipment to enable certain things (or processes) to occur or reappear, so that the natural phenomenon, the natural property and the natural law are known.
Gravitational acceleration is the acceleration that an object has under the influence of gravity. Also called free fall acceleration, is indicated by g. Oriented vertically downward, the size of which can be determined by a variety of methods. Generally, the acceleration g of an object near the ground falling in vacuum under the action of the gravity of the earth is referred to. For ease of calculation, the approximate standard value is typically 980 cm/sec squared or 9.8 m/sec squared. The falling acceleration of an object near the surface of the moon, other planets or stars is called the moon gravitational acceleration, and the gravitational acceleration of a certain planet or star, respectively.
In the physical experiment of the gravity acceleration, a stopwatch is generally used for timing, and then the gravity acceleration is calculated by using a formula, so that the mode has large manual error and is difficult for students to operate. Chinese patent (publication number: CN207051510U) discloses a middle gravity acceleration testing device, which comprises a base, a first telescopic rod, a cross beam, a second telescopic rod, a first photoelectric door, a second photoelectric door and a timer; the upper plane and the lower plane of the base are parallel to each other; the first telescopic rod and the second telescopic rod are respectively fixed and vertically connected with the upper plane of the base; the crossbeam respectively with the top fixed connection of first telescopic link and second telescopic link, just the crossbeam is parallel to the upper plane of base, though the device has improved the measurement accuracy of acceleration of gravity to a certain extent, at actual measurement in-process, the device is difficult to guarantee the levelness of controlling two photoelectric door to make whole measurement have the error, and the device is also comparatively difficult to highly adjusting simultaneously, still can lead to the appearance of not horizontality phenomenon, consequently, needs further improvement.
Disclosure of Invention
The invention aims to provide a gravity acceleration testing device for a physical experiment, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a gravity acceleration testing device for physical experiments comprises a fixed base, wherein a falling box is arranged on the left side of the upper end of the fixed base, a supporting column is arranged on the right side of the upper end of the fixed base, a limiting plate is arranged in the middle of the bottom end of the supporting column, a fixed photoelectric timer is arranged on the left side of the limiting plate, a straight rack is arranged on the right end of the supporting column, the top end of the supporting column is connected with a lifting sleeve through a lifting spring, a driving shell is arranged at the lower end of the right side of the lifting sleeve, a rotating shaft is arranged between the front inner wall and the rear inner wall of the driving shell, a gear matched with the straight rack is arranged in the middle of the front end of the rotating shaft, a worm wheel is arranged in the middle of the rear end of the rotating shaft, a worm is meshed with the lower end of, the inside spout that is equipped with of lifter plate, spout internally mounted have the slide.
As a further scheme of the invention: a buffer spring is installed at the bottom end of the interior of the falling box, a buffer plate is installed at the upper end of the buffer spring, and sand is placed at the upper end of the buffer plate.
As a further scheme of the invention: the right end of the driving shaft penetrates through the driving shell and is connected with a driving handle.
As a further scheme of the invention: the middle part of the movable sleeve is provided with a plurality of screw rods, the inner sides of the screw rods penetrate through the movable sleeve and are connected with a clamping plate, and the outer sides of the screw rods penetrate through the movable sleeve and are connected with an adjusting handle.
As a further scheme of the invention: the inside test steel ball that is equipped with of standing groove, the outside parcel of test steel ball has the rubber layer.
As a further scheme of the invention: the sliding plate penetrates through the middle of the placing groove and contacts the bottom of the test steel ball.
As a further scheme of the invention: the falling box is positioned under the placing groove.
As a still further scheme of the invention: the number of the active photoelectric timers is at least 2.
Compared with the prior art, the invention has the beneficial effects that:
the utility model provides a gravity acceleration testing arrangement for physics experiments, and is rational in infrastructure, and novel in design, through the worm wheel that is equipped with, the worm, mutually support between spur rack and the gear, the quick accurate adjustment of height about the standing groove has been realized, and then initial position's when measuring gravity acceleration change, the quantity of ingesting of experimental data has been increased, cooperation between the movable sleeve through being equipped with simultaneously, distance between to the activity photoelectric sensor also can be adjusted, the further difference change of realizing data has been increased, the measurement accuracy of gravity acceleration has been improved greatly, therefore, the clothes hanger is strong in practicability, and high reliability.
Drawings
Fig. 1 is a schematic front view of a gravitational acceleration testing apparatus for physical experiments.
Fig. 2 is a schematic view of an internal installation structure of the lifting sleeve in fig. 1.
Fig. 3 is a schematic structural diagram of a falling box in a gravitational acceleration testing device for physical experiments.
Fig. 4 is a schematic structural diagram of a movable sleeve in a gravitational acceleration testing device for physical experiments.
Fig. 5 is a schematic view of an installation three-dimensional structure of internal parts of a driving shell in a gravitational acceleration testing device for physical experiments.
In the figure: 1-a fixed base, 2-a falling box, 3-a supporting column, 4-a spur rack, 5-an active photoelectric timer, 6-a limiting plate, 7-a lifting sleeve, 8-a lifting spring, 9-a driving shell, 10-a driving shaft, 11-a worm, 12-a worm wheel, 13-a gear, 14-a rotating shaft, 15-a lifting plate, 16-a sliding chute, 17-a sliding plate, 18-a placing groove, 19-a buffering plate, 20-sand, 21-a buffering spring, 22-a screw, 23-a clamping plate, 24-an adjusting handle, 25-a movable sleeve, 26-a fixed photoelectric timer and 27-a driving handle.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
Referring to fig. 1 to 5, in the embodiment of the invention, a gravity acceleration testing device for a physical experiment comprises a fixed base 1, wherein a falling box 2 is installed on the left side of the upper end of the fixed base 1 and used for receiving a test steel ball in the experiment process, the falling box 2 is located right below a placing groove 18 so as to accurately place and receive the test steel ball, a supporting column 3 is installed on the right side of the upper end of the fixed base 1, a limiting plate 6 is installed in the middle of the bottom end of the supporting column 3, the limiting plate 6 limits the position of a lifting sleeve 7 towards the lower end on the one hand, a fixed photoelectric sensor 26 can be fixedly installed on the other hand, a fixed photoelectric timer 26 is installed on the left side of the limiting plate 6, a spur rack 4 is arranged at the right end of the supporting column 3, the top end of the supporting column 3 is connected with the lifting sleeve 7 through a lifting spring 8, thereby avoiding large-scale shaking during lifting to influence experimental data, the lower end of the right side of the lifting sleeve 7 is provided with the driving shell 9, a rotating shaft 14 is arranged between the front inner wall and the rear inner wall of the driving shell 9, the middle part of the front end of the rotating shaft 14 is provided with the gear 13 which is matched with the spur rack 4, so that the gear 13 can be engaged with the spur rack 4 in a vertical moving mode, the middle part of the rear end of the rotating shaft 14 is provided with the worm wheel 12, the lower end of the worm wheel 12 is engaged with the worm 11, the self-locking function of the engagement between the worm wheel 12 and the worm 11 can be utilized, so that the gear 13 and the position on the spur rack 4 can be kept and positioned, the position of the whole lifting sleeve 7 is limited and supported, the right end of the worm 11 is connected with the driving shaft 10, and the, used for driving the driving shaft 10 to rotate, a movable sleeve 25 is installed in the middle of the upper end of the lifting sleeve 7, a plurality of screw rods 22 are installed in the middle of the movable sleeve 25, the screw rods 22 can telescopically rotate along the middle of the movable sleeve 25, the inner side of each screw rod 22 penetrates through the movable sleeve 25 to be connected with a clamping plate 23 for clamping the lifting sleeve 7, so that the position of the movable photoelectric timer 5 on the lifting sleeve 7 is fixed, the outer side of each screw rod 22 penetrates through the movable sleeve 25 to be connected with an adjusting handle 24 for driving the screw rods 22 to rotate, the left end of the movable sleeve 25 is provided with a movable photoelectric timer 5, the number of the movable photoelectric timers 5 is at least 2, so that at least 2 movable experiment parameters can be moved in one falling experiment, the lifting plate 15 is installed on the left side of the top end of the lifting sleeve 7, a placing groove 18 is installed in the middle of the upper end of the lifting plate 15, the rubber layer wraps the outer side of the test steel ball, so that the impact effect of the test steel ball on the falling box 2 is reduced during a falling experiment, the sliding groove 16 is formed in the lifting plate 15, the sliding plate 17 is arranged inside the sliding groove 16, the sliding plate 17 can move along the inner part of the sliding groove 16, and the sliding plate 17 penetrates through the middle part of the placing groove 18 to be in contact with the bottom of the test steel ball, so that the falling of the test steel ball is limited and fixed.
Example 2
In another embodiment of the present invention, the difference between the embodiment and the above embodiment is that the bottom end inside the drop box 2 is provided with a buffer spring 21, the upper end of the buffer spring 21 is provided with a buffer plate 19, the upper end of the buffer plate 19 is provided with sand 20, and the buffer spring 21, the buffer plate 19 and the sand 20 are arranged inside the drop box 2, so as to buffer the impact force of the test steel ball after the drop process, and avoid the occurrence of accidents caused by the test steel ball jumping out of the drop box 2.
In the invention, during the experiment, the sliding plate 17 is pulled leftwards, so that the test steel ball falls from the placing groove 18, in the process, the movable photoelectric timer 5 and the fixed photoelectric timer 6 can record the position falling onto the horizontal line, and each falling experiment can obtain at least three groups of data t
1、t
2And t
0And recording and measuring the distance between different movable photoelectric timers 5 to obtain a height difference H, and then utilizing a formula
And then obtain different acceleration of gravity, then rotate drive handle 27, make worm 11 and worm wheel 12 mesh through the drive shaft 10 effect, then through the transmission power of rotation axis 14 for gear 13 is along spur rack 4 and then drive whole drive shell 9 and lifting sleeve 7 and carry out upper and lower position control, has satisfied the acquisition of the data of different set points, then after getting rid of both ends value, goes the average value again, can obtain the numerical value of the acceleration of gravity G in the experiment. The invention has reasonable structure and novel design, realizes the rapid and accurate adjustment of the upper and lower heights of the placing groove 18 through the mutual matching of the worm wheel 12, the worm 11, the straight rack 4 and the gear 13, further increases the quantity of the taken experimental data for the change of the initial position during the measurement of the gravity acceleration, and simultaneously can adjust the distance between the movable photoelectric sensors 5 through the matching of the movable sleeves 25, further increases the difference change of the realized data, greatly improves the measurement precision of the gravity acceleration, and has strong practicability and high reliability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides a gravity acceleration testing arrangement for physics experiments, includes unable adjustment base (1), unable adjustment base (1) upper end left side is installed and is fallen case (2), and support column (3) are installed on unable adjustment base (1) upper end right side, and support column (3) bottom mid-mounting has limiting plate (6), and its characterized in that, fixed photoelectric timer (26) are installed in limiting plate (6) left side, and support column (3) right-hand member is equipped with spur rack (4), support column (3) top is connected with lift cover (7) through lift spring (8), and lift cover (7) right side lower extreme installs drive shell (9), installs rotation axis (14) between the inner wall around drive shell (9), and rotation axis (14) front end mid-mounting has gear (13) that mutually supports with spur rack (4), and rotation axis (14) rear end mid-mounting has worm wheel (12), worm wheel (12) lower extreme meshing has worm (11), and worm (11) right-hand member is connected with drive shaft (10), lift cover (7) upper end mid-mounting has movable sleeve (25), and movable photoelectric timer (5) are installed to movable sleeve (25) left end, lifter plate (15) are installed on lift cover (7) top left side, and lifter plate (15) upper end mid-mounting has standing groove (18), and lifter plate (15) inside is equipped with spout (16), and spout (16) internally mounted has slide (17).
2. The gravity acceleration test device for the physical experiment is characterized in that a buffer spring (21) is installed at the bottom end of the interior of the falling box (2), a buffer plate (19) is installed at the upper end of the buffer spring (21), and sand (20) is placed at the upper end of the buffer plate (19).
3. The gravitational acceleration testing device for physical experiments according to claim 1, wherein the right end of the driving shaft (10) is connected with a driving handle (27) through the driving shell (9).
4. The gravitational acceleration testing device for physical experiments according to claim 1, wherein a plurality of screws (22) are installed in the middle of the movable sleeve (25), the inner side of each screw (22) penetrates through the movable sleeve (25) to be connected with a clamping plate (23), and the outer side of each screw (22) penetrates through the movable sleeve (25) to be connected with an adjusting handle (24).
5. The gravitational acceleration testing device for physical experiments as recited in claim 1, wherein said placing groove (18) is internally provided with a testing steel ball, and the outer side of the testing steel ball is wrapped with a rubber layer.
6. The gravitational acceleration test device for physical experiments according to claim 5, wherein the sliding plate (17) passes through the middle of the placing groove (18) and contacts the bottom of the test steel ball.
7. The gravitational acceleration testing device for physical experiments according to claim 1 or 2, wherein the drop box (2) is located directly below the placement groove (18).
8. The gravitational acceleration testing device for physical experiments as recited in claim 1, wherein said active photoelectric timer (5) is at least 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911237929.5A CN110782748A (en) | 2019-12-06 | 2019-12-06 | Gravity acceleration testing arrangement for physics experiments |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911237929.5A CN110782748A (en) | 2019-12-06 | 2019-12-06 | Gravity acceleration testing arrangement for physics experiments |
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| Publication Number | Publication Date |
|---|---|
| CN110782748A true CN110782748A (en) | 2020-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911237929.5A Withdrawn CN110782748A (en) | 2019-12-06 | 2019-12-06 | Gravity acceleration testing arrangement for physics experiments |
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| CN (1) | CN110782748A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111933001A (en) * | 2020-08-31 | 2020-11-13 | 重庆水利电力职业技术学院 | Teaching presentation device for engineering mechanics |
| CN112033861A (en) * | 2020-08-25 | 2020-12-04 | 淄博纳瑞仪器有限公司 | Temperature-adjustable liquid viscosity detection device |
| CN112051617A (en) * | 2020-08-27 | 2020-12-08 | 江苏师范大学 | Gravity acceleration measuring instrument with accurate and automatic distance adjustment function |
| CN115836822A (en) * | 2023-02-17 | 2023-03-24 | 长春电子科技学院 | Inside automatic cleaning device for cleaning robot |
-
2019
- 2019-12-06 CN CN201911237929.5A patent/CN110782748A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033861A (en) * | 2020-08-25 | 2020-12-04 | 淄博纳瑞仪器有限公司 | Temperature-adjustable liquid viscosity detection device |
| CN112051617A (en) * | 2020-08-27 | 2020-12-08 | 江苏师范大学 | Gravity acceleration measuring instrument with accurate and automatic distance adjustment function |
| CN111933001A (en) * | 2020-08-31 | 2020-11-13 | 重庆水利电力职业技术学院 | Teaching presentation device for engineering mechanics |
| CN111933001B (en) * | 2020-08-31 | 2021-04-02 | 重庆水利电力职业技术学院 | Teaching presentation device for engineering mechanics |
| CN115836822A (en) * | 2023-02-17 | 2023-03-24 | 长春电子科技学院 | Inside automatic cleaning device for cleaning robot |
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Application publication date: 20200211 |