CN110009977B - Data acquisition device and method for physical horizontal projectile motion - Google Patents
Data acquisition device and method for physical horizontal projectile motion Download PDFInfo
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Abstract
The invention provides a data acquisition device and a data acquisition method for physical horizontal projectile motion, wherein the data acquisition device comprises the following steps: the device comprises a pressure sensor, a rotation angle sensor, a level meter, an origin alignment assembly and a laser range finder; the pressure sensor is arranged at the top end of the guide rail, the rotation angle sensor is arranged at a corner of the guide rail, the level gauge is arranged at the horizontal part of the guide rail, the origin alignment assembly is arranged at the tail end of the horizontal part of the guide rail, and the guide rail is fixed on the inner plate; the laser range finder is respectively arranged at one end of the blocking groove and the upper end of the inner plate and is used for respectively measuring the abscissa and the ordinate. The method has the advantages that the falling points of the horizontal projectile motion are continuously recorded for many times, and the curves are adopted to fit each point to form the parabola, so that the problem that the motion law cannot be quantitatively analyzed in the horizontal projectile motion data acquisition in the prior art is solved, the motion law is revealed in a qualitative and quantitative combined mode, the device is simple in design, small in operation difficulty and easy to popularize.
Description
Technical Field
The invention relates to the technical field of physical experiments, in particular to a data acquisition device and a data acquisition method for physical horizontal projectile motion.
Background
Throwing the object at a certain initial speed along the horizontal direction, wherein the object only moves under the action of gravity without considering air resistance, namely horizontal throwing motion. The horizontal projectile motion can be divided into two partial motions, namely a uniform linear motion in the horizontal direction and a free falling motion in the vertical direction.
At present, the experimental method for researching the flat projectile motion law comprises the following steps: 1. researching the motion track of the robot by using a tracing method; 2. quantitatively researching the motion rule of the flash photos; 3. and (5) qualitatively analyzing the motion rule by using a horizontal projectile motion decomposer. The first method can only qualitatively explain the motion trail, and cannot research the motion rule. The second method can quantitatively analyze the law of the horizontal projectile motion, has deep analysis and good effect, but has complex experimental equipment, high price and great operation difficulty, and can only be carried out in a dark room, so the method is difficult to popularize. Ready-made photos which are already photographed are commonly used in teaching, students cannot experiment in person, and teachers cannot demonstrate the photos well. The third method indirectly analyzes the horizontal projectile motion by using a comparison method, and still belongs to a qualitative method.
Disclosure of Invention
The invention aims to provide a data acquisition device and a data acquisition method for physical horizontal projectile motion, which aim to solve the problem that the motion law cannot be quantitatively analyzed in horizontal projectile motion data acquisition in the prior art, disclose the motion law in a qualitative and quantitative combined mode, and have simple design and easy operation.
In order to achieve the technical purpose, the invention provides a data acquisition device for physical horizontal projectile motion, which comprises:
the device comprises a pressure sensor, a rotation angle sensor, a level meter, an origin alignment assembly and a laser range finder;
the pressure sensor is arranged at the top end of the guide rail, the rotation angle sensor is arranged at a corner of the guide rail, the level gauge is arranged at the horizontal part of the guide rail, the origin alignment assembly is arranged at the tail end of the horizontal part of the guide rail, and the guide rail is fixed on the inner plate;
the inner plate is adhered with coordinate paper and fixed on the base, the base is also provided with a sliding rod, the sliding rod is provided with a blocking groove, and the blocking groove moves up and down along the sliding rod and is fixed at a certain position;
the laser range finder is respectively arranged at one end of the blocking groove and the upper end of the inner plate and is used for respectively measuring the abscissa and the ordinate.
Preferably, the pressure sensor is used for verifying whether the small ball is fixed at the initial position by acquiring a signal for releasing the small ball, and comprises a built-in wire, a copper rod, a copper sheet, a micro power supply and a current detection assembly, wherein the built-in wire is always connected with the copper rod, and the copper sheet is externally connected with a wire which is connected with the built-in wire through the micro power supply and the current detection assembly to form a loop.
Preferably, when the copper rod is subjected to pressure reduction, the copper rod contacts the copper sheet at the bottom, the whole loop generates current, the signal is received by the current detection assembly, and the current signal is wirelessly transmitted to the computer terminal.
Preferably, the rotation angle sensor is used for acquiring a falling angle of the object at an initial speed, and comprises a fixing strip, a resistance coil wire, a micro-ammeter and a micro-power supply.
Preferably, be provided with the card strip on the fixed strip, through the cooperation design with the recess for fix the fixed strip with different angles, the bottom connecting wire of fixed strip is respectively through miniature power and little ampere meter, and through wire connecting resistance circle.
Preferably, the level meter is used for judging whether the horizontal part of the guide rail is horizontally arranged or not, and comprises copper sheets at two ends of a circular tube, an iron ball, a bottom copper sheet, a lead, a micro power supply and a current signal processing module, wherein when the level meter is horizontally arranged, the iron ball is in the middle position, the current is not conducted, the signal output end has no output, and when the level meter is inclined, the iron ball is in contact with the copper sheet at one end and is always connected with the copper sheet at the bottom to form a passage.
Preferably, the initial point alignment subassembly is used for judging whether the guide rail end aligns with the coordinate paper initial point, including metal bump, miniature concave piece, wire, miniature power and electric current signal processing module, the metal bump is installed in the one side that the terminal export of guide rail is close to the inner panel, miniature concave piece installation and inner panel on with initial point horizontally position, miniature concave piece is provided with metal coating in the depressed place.
The invention also provides a data acquisition method of physical horizontal projectile motion, which is realized by the device and comprises the following steps:
s1, adjusting the angle of the track, checking whether the tail end of the track is overlapped with the original point of the coordinate paper through the original point alignment assembly, and checking whether the track is horizontally placed through a level meter;
s2, monitoring whether the small ball is released or not through the pressure sensor, and measuring the horizontal and vertical coordinates of the falling point of the small ball by using the laser range finder after the small ball is released;
s3, repeating the step S2, obtaining a certain number of falling point coordinates, and fitting the coordinates into a curve;
and S4, adjusting the angle of the track, and respectively obtaining flat throwing curves at different angles.
The effect provided in the summary of the invention is only the effect of the embodiment, not all the effects of the invention, and one of the above technical solutions has the following advantages or beneficial effects:
compared with the prior art, the data acquisition of the physical horizontal projectile motion is realized by arranging the pressure sensor, the rotation angle sensor, the level gauge, the alignment assembly and the laser range finder. Whether the horizontal projectile body is released or not is monitored through the pressure sensor, the angle information during falling is monitored through the rotation angle sensor, whether the guide rail is horizontal or not and whether a falling point is aligned with the origin of the coordinate paper or not are monitored through the level gauge and the origin alignment assembly, and therefore accuracy of horizontal projectile motion data is guaranteed. The horizontal and vertical coordinates of the falling point are monitored by a laser range finder, the falling point of the horizontal projectile motion for multiple times is continuously recorded by adjusting the height of the blocking groove, and each point is fitted by adopting a curve to form a parabola. The invention solves the problem that the motion law cannot be quantitatively analyzed in the horizontal projectile motion data acquisition in the prior art, realizes the qualitative and quantitative combined mode to reveal the motion law, and has the advantages of simple device design, small operation difficulty and easy popularization.
Drawings
Fig. 1 is a schematic structural diagram of a data acquisition device for physical horizontal projectile motion provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a pressure sensor provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a rotation angle sensor according to an embodiment of the present invention;
FIG. 4 is a schematic view of a spirit level according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an origin alignment assembly according to an embodiment of the present invention.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
The following describes in detail a data acquisition device and method for physical horizontal projectile motion according to an embodiment of the present invention with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present invention discloses a data acquisition device for physical horizontal projectile motion, including:
the device comprises a pressure sensor, a rotation angle sensor, a level meter, an origin alignment assembly and a laser range finder;
the pressure sensor is arranged at the top end of the guide rail, the rotation angle sensor is arranged at a corner of the guide rail, the level gauge is arranged at the horizontal part of the guide rail, the origin alignment assembly is arranged at the tail end of the horizontal part of the guide rail, and the guide rail is fixed on the inner plate;
the inner plate is adhered with coordinate paper and fixed on the base, the base is also provided with a sliding rod, the sliding rod is provided with a blocking groove, and the blocking groove moves up and down along the sliding rod and is fixed at a certain position;
the laser range finder is respectively arranged at one end of the blocking groove and the upper end of the inner plate and is used for respectively measuring the abscissa and the ordinate.
The pressure sensor is used for verifying whether the small ball is fixed at the initial position by acquiring a signal for releasing the small ball, as shown in fig. 2, the pressure sensor is placed at the upper part of the clamp at the initial position, and whether an object is clamped is verified by a current signal.
The built-in lead is always in a connection state with the copper bar, and the copper sheet at the bottom is externally connected with a lead which is connected with the built-in lead through a micro power supply to form a loop. And a current detection component for detecting a current signal is arranged in the loop, when the top of the copper rod is subjected to pressure reduction, the copper rod contacts the copper sheet at the bottom, the whole loop generates current, the signal is received by the current detection component, and the current signal is wirelessly transmitted to the computer terminal. The wireless transmission mode comprises Bluetooth, Wifi and the like.
And fixing the small ball on the top of the pressure sensor copper bar, disconnecting the loop when releasing the small ball, and verifying whether the small ball is released according to the current change monitored by the current detection assembly.
The rotation angle sensor is used for acquiring a falling angle of an object at an initial speed, and sending angle information to a computer terminal in the form of an electric signal, as shown in fig. 3.
The whole loop comprises a fixed strip, a resistance coil wire, a micro-ammeter and a micro-power supply. The resistance coil wire is provided with fixing grooves, and in the embodiment of the invention, the number of the grooves is set to be 17, so that the angle is changed to 5-85 degrees, and one groove is arranged every 5 degrees. Be provided with the card strip on the fixed strip, through the cooperation design with the recess for fix the fixed strip with different angles. The bottom end of the fixed strip is connected with a lead, and the lead is respectively connected with the resistance coil through the micro power supply and the micro ammeter. The angle is calculated by judging the current flowing through the whole loop, the change range of the current is 0.1-2.0A, the resistance range is 1-30 omega, and the power supply is 3V. When the angle is 5 degrees, the resistance in the loop is maximum, the current is minimum, about 0.1A, and when the angle is 85 degrees, the current in the loop is maximum, about 2A.
The level gauge is used to determine whether the horizontal portion of the rail is horizontally disposed, as shown in fig. 4.
The whole loop of the level gauge comprises copper sheets at two ends of a circular tube, iron balls, a bottom copper sheet, a lead, a micro power supply and a current signal processing module. When the guide rail is horizontally placed, the iron ball is located in the middle, the current is not conducted, the signal output end has no output, when the guide rail is inclined, the iron ball is in contact with the copper sheet at one end and is always connected with the copper sheet at the bottom, a channel is formed, the signal end outputs signals, and the guide rail is indicated to be not horizontally placed.
The origin alignment component is used for judging whether the tail end of the guide rail is aligned with the origin of the graph paper or not, and is shown in fig. 5.
The whole loop of the origin alignment assembly comprises a metal convex point, a micro concave sheet, a lead, a micro power supply and a current signal processing module. The metal salient points are arranged on one side, close to the inner plate, of the tail end outlet of the guide rail, and the micro concave sheet is arranged on the position, horizontal to the original point, of the inner plate. The micro concave sheet is provided with a metal coating at the concave position.
When the tail end position of the guide rail is coincided with the origin of coordinates, the current loop is communicated to generate a current signal, the current signal indicates that the current signal is aligned, otherwise, the current signal is not aligned, and the setting needs to be consistent with the position of the concave sheet for installing the inner plate at the origin of the coordinate paper.
The laser range finder is used for acquiring coordinates of the falling position of the small balls. In the embodiment of the invention, two laser range finders are arranged and are respectively positioned at one end of the blocking groove and the inner plate. The laser range finder in the baffle groove is used for measuring the transverse distance, namely the abscissa of the small ball falling point; the vertical laser range finder on the inner panel measures the distance from the top starting point of the coordinate paper to the blocking groove, namely the vertical coordinate of the falling of the small ball. Therefore, the coordinates of each falling point of the small ball can be obtained and transmitted to the computer terminal.
According to the embodiment of the invention, the data acquisition of the physical horizontal projectile motion is realized by arranging the pressure sensor, the rotation angle sensor, the level gauge, the alignment assembly and the laser range finder. Whether the horizontal projectile body is released or not is monitored through the pressure sensor, the angle information during falling is monitored through the rotation angle sensor, whether the guide rail is horizontal or not and whether a falling point is aligned with the origin of the coordinate paper or not are monitored through the level gauge and the origin alignment assembly, and therefore accuracy of horizontal projectile motion data is guaranteed. The horizontal and vertical coordinates of the falling point are monitored by a laser range finder, the falling point of the horizontal projectile motion for multiple times is continuously recorded by adjusting the height of the blocking groove, and each point is fitted by adopting a curve to form a parabola. The invention solves the problem that the motion law cannot be quantitatively analyzed in the horizontal projectile motion data acquisition in the prior art, realizes the qualitative and quantitative combined mode to reveal the motion law, and has the advantages of simple device design, small operation difficulty and easy popularization.
The embodiment of the invention also discloses a data acquisition method of physical horizontal projectile motion, which comprises the following operations:
s1, adjusting the angle of the track, checking whether the tail end of the track is overlapped with the original point of the coordinate paper through the original point alignment assembly, and checking whether the track is horizontally placed through a level meter;
s2, monitoring whether the small ball is released or not through the pressure sensor, and measuring the horizontal and vertical coordinates of the falling point of the small ball by using the laser range finder after the small ball is released;
s3, repeating the step S2, obtaining a certain number of falling point coordinates, and fitting the coordinates into a curve;
and S4, adjusting the angle of the track, and respectively obtaining flat throwing curves at different angles.
Place the flat throw experiment appearance on the desktop, look over the terminal initial point coincidence with the coordinate paper of track through the initial point alignment subassembly, look over the track through the spirit level and whether the level is placed.
The angle of the track is adjusted through rotating a rotating button at the position of the rotating track, and the angle value is acquired by a rotating angle sensor and is sent to a computer terminal. The small ball is placed to the initial position and fixed at the top of the track through a clamp, and a pressure sensor on the clamp is used for determining whether the small ball is released or not.
After the small ball is released, the small ball slides to the blocking groove, a point can be left on the coordinate paper, the coordinate of the falling point is measured through the laser range finder at the moment, and the horizontal coordinate and the vertical coordinate of the falling point are obtained.
And adjusting the position height of the baffle groove, repeating the horizontal projectile motion from high to bottom until a preset number of points are left, and fitting each point by using a smooth curve to form a parabola-like line.
And performing a condition comparison test by using a control variable method, adjusting the rotating angle by rotating the button to change the inclination angle of the small ball from 5 degrees to 90 degrees, repeating the flat projectile motion, fitting a track curve, and observing the flat projectile motion rule of the small ball.
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 and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A data acquisition device for physical panning motion, the device comprising:
the device comprises a pressure sensor, a rotation angle sensor, a level meter, an origin alignment assembly and a laser range finder;
the pressure sensor is arranged at the top end of the guide rail, the rotation angle sensor is arranged at a corner of the guide rail, the level gauge is arranged at the horizontal part of the guide rail, the origin alignment assembly is arranged at the tail end of the horizontal part of the guide rail, and the guide rail is fixed on the inner plate;
the pressure sensor is used for verifying whether the small ball is fixed at an initial position or not by acquiring a signal for releasing the small ball, and comprises a built-in wire, a copper bar, a copper sheet, a micro power supply and a current detection assembly, wherein the built-in wire is always connected with the copper bar, and the copper sheet is externally connected with a wire which is connected with the built-in wire through the micro power supply and the current detection assembly to form a loop; when the copper rod is subjected to pressure reduction, the copper rod contacts the copper sheet at the bottom, the whole loop generates current, a signal is received by the current detection assembly, and the current signal is wirelessly transmitted to the computer terminal;
the origin alignment assembly is used for judging whether the tail end of the guide rail is aligned with the origin of the coordinate paper or not and comprises a metal convex point, a miniature concave sheet, a lead, a miniature power supply and a current signal processing module, wherein the metal convex point is arranged on one side, close to the inner plate, of the outlet at the tail end of the guide rail;
the inner plate is adhered with coordinate paper and fixed on the base, the base is also provided with a sliding rod, the sliding rod is provided with a blocking groove, and the blocking groove moves up and down along the sliding rod and is fixed at a certain position;
the laser range finders are respectively arranged at one end of the blocking groove and the upper end of the inner plate, and respectively measure the abscissa and the ordinate;
the rotation angle sensor is used for acquiring a falling angle of an object at an initial speed and comprises a fixed bar, a resistance coil wire, a micro-ammeter and a micro power supply;
the fixing strip is provided with a clamping strip, the clamping strip is used for fixing the fixing strip at different angles through the matching design with the groove, the bottom end of the fixing strip is connected with a lead, and the lead is respectively connected with a resistance coil through a micro power supply and a micro ammeter;
the number of the grooves is set to be 17, the angle is changed to be 5-85 degrees, one groove is arranged every 5 degrees, the angle is calculated by judging the current flowing through the whole loop, the change range of the current is 0.1-2.0A, the resistance range is 1-30 omega, the power supply is 3V, when the angle is 5 degrees, the resistance in the loop is the largest, the current is the smallest, and when the angle is 85 degrees, the current in the loop is the largest.
2. The data acquisition device of physical flat projectile motion of claim 1, wherein the level gauge is used for judging whether the horizontal part of the guide rail is horizontally placed or not, and comprises copper sheets at two ends of a circular tube, an iron ball, a bottom copper sheet, a lead, a micro power supply and a current signal processing module, when the horizontal part is placed, the iron ball is in the middle position, the current is not conducted, the signal output end has no output, and when the horizontal part is tilted, the iron ball is in contact with the copper sheet at one end and is always connected with the bottom copper sheet to form a passage.
3. A method for data acquisition of physical horizontal projectile motion, which is implemented by the apparatus of any one of claims 1-2, wherein the method comprises the following steps:
s1, adjusting the angle of the track, checking whether the tail end of the track is overlapped with the original point of the coordinate paper through the original point alignment assembly, and checking whether the track is horizontally placed through a level meter;
s2, monitoring whether the small ball is released or not through the pressure sensor, and measuring the horizontal and vertical coordinates of the falling point of the small ball by using the laser range finder after the small ball is released;
s3, repeating the step S2, obtaining a certain number of falling point coordinates, and fitting the coordinates into a curve;
and S4, adjusting the angle of the track, and respectively obtaining flat throwing curves at different angles.
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| CN112326460B (en) * | 2020-09-22 | 2022-02-22 | 河南大学 | Practical shear member bearing capacity test device |
| CN112270875B (en) * | 2020-11-03 | 2022-04-01 | 商洛学院 | Physical gravity experiment simulation device |
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