A wireless centripetal force experiment device

Abstract

The utility model discloses a wireless centripetal force experimenter, comprising a base, a rotating bracket installed on the top of the base, a motor fixing bracket fixed below the rotating bracket, and a stepping motor fixed in the motor fixing bracket; a pulley of a belt transmission structure is fixed on the output shaft of the stepping motor, another pulley is fixedly connected to the lower end of the transmission shaft, and the top end of the transmission shaft is connected to a main body lower cover; a force sensor is installed in a rotating arm; one end of a weight fixing rod is connected to one end of the main body upper cover, and the other end of the weight fixing rod is connected to one side of the force sensor, and the weight is fixed on the weight fixing rod; one end of a balancing rod is connected to the other end of the main body upper cover, and the other end is connected to the other side of the force sensor; a single-chip microcomputer is fixed in the rotating arm, and the force sensor is electrically connected to the single-chip microcomputer; the centripetal force generated during the rotation of the weight acts on the force sensor to accurately collect centripetal force experimental data.

Description

Technical Field

[0001] The utility model belongs to the technical field of teaching equipment, in particular to a wireless centripetal force experiment device. Background Art

[0002] In the teaching process, when using the centripetal force tester to conduct centripetal force experiments, pure mechanical centripetal force experimental equipment is used for the experiment. During the experiment, the operator manually observes the experimental results and records the experimental data. Due to the influence of the error of the experimental data obtained, it is difficult for this type of centripetal force experimental equipment to accurately restore the centripetal force experiment. Utility Model Content

[0003] The utility model aims to provide a wireless centripetal force experimenter, which collects centripetal force data through sensors and single-chip microcomputers to improve the accuracy of data collection.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A wireless centripetal force experimenter comprises a base, a rotating bracket is mounted on the top of the base, a motor fixing bracket is fixed below the rotating bracket, a stepping motor is fixed in the motor fixing bracket, and a main body upper cover is mounted above the main body lower cover to form a rotating arm;

[0006] One pulley of the belt transmission structure is fixed on the output shaft of the stepper motor, and another pulley of the belt transmission structure is fixedly connected to the lower end of the transmission shaft along the axial direction, and the top end of the transmission shaft is connected to the bottom of the lower cover of the main body;

[0007] The force sensor is vertically installed in the rotating arm; one end of the weight fixing rod is connected to one end of the main body upper cover, and the other end of the weight fixing rod is connected to one side of the force sensor, and the weight is fixed on the weight fixing rod; one end of the balancing rod is connected to the other end of the main body upper cover, and the other end of the balancing rod is connected to the other side of the force sensor;

[0008] A single-chip microcomputer is fixed in the rotating arm, and the force sensor is electrically connected to the single-chip microcomputer;

[0009] When the stepper motor drives the rotating arm to rotate, the centripetal force generated by the subsequent rotation of the weight acts on the force sensor through the weight fixing rod, and the force sensor transmits information to the single-chip microcomputer to accurately collect centripetal force experimental data.

[0010] Preferably, the single chip microcomputer is electrically connected to a wireless sensor, and the single chip microcomputer transmits the centripetal force experimental data to a host computer through the wireless sensor.

[0011] Preferably, a photoelectric gate is installed at one end of the rotating arm; the light emitting device in the photoelectric gate is installed below the end of the main body upper cover; the receiving device in the photoelectric gate is installed above the end of the main body lower cover, and the light emitting device and the receiving device are aligned in the longitudinal direction.

[0012] Preferably, a photoelectric gate baffle is fixed above the end of the rotating bracket away from the transmission shaft; during the rotation process, the rotating arm drives the light emitting device and the receiving device to pass above and below the photoelectric gate baffle respectively, and the rotation speed of the rotating arm is measured by the photoelectric gate baffle.

[0013] Preferably, the photoelectric door baffle comprises a base, a baffle in a right angle shape is formed on the top surface of the base; a light blocking sheet is arranged on the baffle; and the base is fixed on the top surface of the rotating bracket.

[0014] Preferably, the rotating bracket includes a support frame, and a connecting rod is vertically fixed below the support frame; the connecting rod is mounted on the base.

[0015] Preferably, the main body lower cover comprises a lower cover shell, a connecting pipe is vertically fixed at the bottom of the lower cover shell, and the transmission shaft is axially installed in the connecting pipe; a clip is fixed inside the lower cover shell, and the clip is used to fix the lower end of the force sensor; a first fixing frame is provided at one end of the lower cover shell.

[0016] Preferably, the main body upper cover comprises an upper cover shell, and a second fixing frame is provided at one end of the upper cover shell; the first fixing frame and the second fixing frame are used to install the photoelectric door.

[0017] Preferably, the motor fixing bracket includes a first supporting portion, a second supporting portion is fixed to one end of the first supporting portion; the stepping motor is fixed in the first supporting portion; and the transmission shaft is rotatably arranged in the second supporting portion.

[0018] Preferably, the weight of the weight is adjusted to generate a corresponding centripetal force, so as to implement the experiment under the action of the corresponding centripetal force.

[0019] The beneficial effects of the utility model are as follows:

[0020] When the stepper motor drives the rotating arm to rotate, the rotating arm drives the weight fixing rod and the weight thereon. The weight generates centripetal force when rotating around the transmission shaft. The centripetal force acts on the force sensor along the weight fixing rod. During the rotation, the force sensor collects the centripetal force value generated by the weight in real time. The centripetal force value collected by the force sensor is sent to the single-chip microcomputer. During the experiment, the centripetal force value generated by the weight can be collected in real time. In addition, the force sensor collects and sends the data to the single-chip microcomputer, and the data is collected digitally to reduce the error caused by manual observation and improve the accuracy of centripetal force data collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of the wireless centripetal force tester of the present invention as viewed from one side;

[0022] Figure 2 A three-dimensional view of the wireless centripetal force tester of the utility model observed from the other side;

[0023] Figure 3 The utility model is a structural diagram of the motor fixing bracket;

[0024] Figure 4 The structure diagram of the photoelectric door baffle of the utility model;

[0025] Figure 5 A structural diagram of the rotating bracket of the utility model viewed from the side and below;

[0026] Figure 6 A structural diagram of the rotating bracket of the utility model viewed from the upper side and tilted downward;

[0027] Figure 7 The structure diagram of the main body under the cover of the utility model;

[0028] Figure 8 The structure diagram of the main cover of the utility model;

[0029] Reference numerals:

[0030] 1. Base; 2. Motor fixing bracket; 21. First supporting part; 22. Second supporting part; 3. Rotating bracket; 31. Support frame; 32. Connecting rod; 4. Main body lower cover; 41. Lower cover shell; 42. Connecting pipe; 43. First fixing frame; 44. Clip; 5. Main body upper cover; 51. Upper cover shell; 52. Second fixing frame; 6. Weight fixing rod; 7. Photoelectric door baffle; 71. Base; 72. Baffle; 8. Stepping motor; 9. Belt drive structure; 10. Force sensor; 11 Balancing rod; 12. Transmission shaft. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0032] For the above technical issues, refer to Figure 1 and Figure 2 The present embodiment provides a wireless centripetal force experimenter, comprising a base 1, a rotating bracket 3 mounted on the top of the base 1, a motor fixing bracket 2 fixed below the rotating bracket 3, and a stepping motor 8 fixed in the motor fixing bracket 2 by screws. A main body upper cover 5 is covered on the top of a main body lower cover 4 and fixed by bolts, and the main body upper cover 5 and the main body lower cover 4 form a rotating arm.

[0033] The belt transmission structure 9 includes two pulleys, and the two pulleys are driven by belts. One pulley of the belt transmission structure 9 is fixed on the output shaft of the stepper motor 8, and the other pulley of the belt transmission structure 9 is fixedly connected to the lower end of the transmission shaft 12 along the axial direction. The transmission shaft 12 is rotatably inserted into the rotating bracket 3, and the top end of the transmission shaft 12 extends to the top of the rotating bracket 3 and is fixedly connected to the bottom of the main body lower cover 4.

[0034] A mounting hole is provided in the top plate of the main body cover 5, and the force sensor 10 is vertically mounted in the rotating arm through the mounting hole. One end of the weight fixing rod 6 is connected to one end of the main body cover 5, and the other end of the weight fixing rod 6 is connected to one side of the force sensor 10, and the weight is fixed on the weight fixing rod 6. One end of the balancing rod 11 is connected to the other end of the main body cover 5, and the other end of the balancing rod 11 is connected to the other side of the force sensor 10.

[0035] A single chip microcomputer is fixed in the rotating arm, and the force sensor 10 is electrically connected to the single chip microcomputer.

[0036] When the stepper motor 8 drives the rotating arm to rotate, the rotating arm drives the weight fixing rod 6 and the weight thereon. When the weight rotates around the transmission shaft 12, a centripetal force is generated. The centripetal force acts on the force sensor 10 along the weight fixing rod 6. During the rotation, the force sensor 10 collects the centripetal force value generated by the weight in real time.

[0037] The centripetal force value collected by the force sensor 10 is sent to the single chip microcomputer, and the centripetal force value generated by the weight can be collected in real time during the experiment. In addition, by collecting and sending the centripetal force value to the single chip microcomputer through the force sensor 10, the error caused by manual observation is reduced through digital collection, and the accuracy of centripetal force data collection is improved.

[0038] During the experiment, the weight of the weight is adjusted to generate a corresponding centripetal force, so as to realize the experiment under the corresponding centripetal force, so as to collect experimental data under different centripetal forces. For example, weights of 5 grams, 10 grams, and 15 grams can be used to realize the experiment.

[0039] The single chip microcomputer is electrically connected to a wireless sensor, and the single chip microcomputer transmits the centripetal force experimental data to a host computer through the wireless sensor. The host computer may be a computer. The single chip microcomputer sending data to the host computer through the wireless sensor is a prior art and will not be described in detail here.

[0040] The host computer can send commands to the controller of the stepper motor 8 via wireless communication to set the operating state of the stepper motor 8.

[0041] For example, after the wireless centripetal force experimenter completes an experiment, before the next experiment, the operating parameters of the wireless centripetal force experimenter need to be adjusted so that the wireless centripetal force experimenter runs according to the new operating state to complete the new experiment. The host computer can send a command to the controller of the stepper motor 8 to set the operating speed, operating angle, etc. of the stepper motor 8.

[0042] A photoelectric gate is installed at one end of the rotating arm. The light-emitting device in the photoelectric gate is installed below the end of the main body upper cover 5, and the receiving device in the photoelectric gate is installed above the end of the main body lower cover 4, and the light-emitting device and the receiving device are aligned in the longitudinal direction.

[0043] A photoelectric gate baffle 7 is bolted to the top of the end of the rotating bracket 3 away from the transmission shaft 12. During the rotation of the rotating arm, the light emitting device and the receiving device are driven to pass through the top and bottom of the photoelectric gate baffle 7 respectively, and the rotation speed of the rotating arm is measured by the photoelectric gate baffle 7. (The actual use of the photoelectric gate in this application is described in detail)

[0044] Reference Figure 4 The photoelectric gate baffle 7 includes a base 71, and the base 71 is fixed on the top surface of the rotating bracket 3. A right-angle baffle 72 is formed on the top surface of the base 71, and a light baffle is provided on the baffle 72, and the light baffle is placed in the horizontal direction. The mechanical structure in this application can be manufactured by 3D printing.

[0045] During the implementation process, when the rotating arm rotates to the light blocking plate position, the light blocking plate is located between the light emitting device and the receiving device in the longitudinal direction, blocking the light emitted by the light emitting device.

[0046] The photoelectric gate sends a signal to the timing circuit (which can be implemented by a single product machine, is the prior art in the field, and is not described in detail here) to start timing. When the rotary arm completely rotates and passes through the photoelectric gate baffle 7, the timing is stopped. According to the time interval between starting and stopping the timing, the time t that the light baffle blocks the light is obtained.

[0047] The force sensor 10 detects the centripetal force F generated by the weight.

[0048] According to the formula v=s / t, the instantaneous linear velocity v of the rotating arm when passing through the light blocking sheet is calculated.

[0049] Wherein, t is the time that the light shielding sheet blocks the light, and s is the width of the light shielding sheet.

[0050] According to the formula w=v / r, the angular velocity w of the rotating arm at this time is calculated.

[0051] Among them, v is the instantaneous linear velocity of the rotating arm when passing through the light blocking plate, and r is the rotation radius of the photoelectric gate, that is, the distance from the photoelectric gate to the transmission shaft 12.

[0052] The single chip microcomputer sends the centripetal force F and angular velocity w to the host computer through the wireless network to complete data collection.

[0053] Reference Figure 5 , Figure 6 The rotating bracket 3 includes a support frame 31, and a connecting rod 32 is vertically fixed below the support frame 31. The connecting rod 32 can be installed on the support frame 31 by threading. The bottom of the base 1 is a disc-shaped structure, and a circular tube is vertically formed above the disc-shaped structure. The connecting rod 32 is fixed in the circular tube, so that the connecting rod 32 is installed on the base 1.

[0054] Reference Figure 7 The main body lower cover 4 includes a lower cover shell 41, a connecting pipe 42 is vertically fixed to the bottom of the lower cover shell 41, and the upper end of the transmission shaft 12 is axially installed in the connecting pipe 42.

[0055] The clip 44 is fixed inside the lower cover shell 41. The clip 44 is a concave clip. The force sensor 10 is vertically inserted into the main body upper cover 5 and the main body lower cover 4. The lower end of the force sensor 10 is clamped in the clip 44. The clip 44 fixes the lower end of the force sensor 10. A rectangular first fixing frame 43 is provided at one end of the lower cover shell 41. The receiving device in the photoelectric gate is installed in the first fixing frame 43.

[0056] Reference Figure 8The main body upper cover 5 includes an upper cover shell 51, and a rectangular second fixing frame 52 is arranged at one end of the upper cover shell 51, and the light-emitting device in the photoelectric gate is installed in the second fixing frame 52.

[0057] The first fixing frame 43 and the second fixing frame 52 are aligned in the longitudinal direction.

[0058] Reference Figure 3 The motor fixing bracket 2 includes a first supporting portion 21, and a second supporting portion 22 is formed at one end of the first supporting portion 21. The stepping motor 8 is fixed in the first supporting portion 21 by bolts, and the transmission shaft 12 is rotatably arranged in the second supporting portion 22.

[0059] Working principle:

[0060] When the stepper motor drives the rotating arm to rotate, the rotating arm drives the weight fixing rod and the weight thereon. The weight generates centripetal force when rotating around the transmission shaft. The centripetal force acts on the force sensor 10 along the weight fixing rod 6. During the rotation, the force sensor 10 collects the centripetal force value generated by the weight in real time. The centripetal force value collected by the force sensor 10 is sent to the single-chip microcomputer. During the experiment, the centripetal force value generated by the weight can be collected in real time. In addition, the force sensor 10 collects and sends the data to the single-chip microcomputer, and the error caused by manual observation is reduced through digital collection, thereby improving the accuracy of centripetal force data collection.

[0061] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wireless centripetal force experiment device, comprising a base (1), a rotating bracket (3) mounted on the top of the base (1), a motor fixing bracket (2) fixed below the rotating bracket (3), a stepping motor (8) fixed in the motor fixing bracket (2), characterized in that , the main body upper cover (5) is installed above the main body lower cover (4) to form a rotating arm; One pulley of the belt transmission structure (9) is fixed on the output shaft of the stepping motor (8), and another pulley of the belt transmission structure (9) is fixedly connected to the lower end of the transmission shaft (12) along the axial direction, and the top end of the transmission shaft (12) is connected to the bottom of the main body lower cover (4); The force sensor (10) is vertically mounted in the rotating arm; one end of a weight fixing rod (6) is connected to one end of a main body upper cover (5), the other end of the weight fixing rod (6) is connected to one side of the force sensor (10), and the weight is fixed on the weight fixing rod (6); one end of a balancing rod (11) is connected to the other end of the main body upper cover (5), the other end of the balancing rod (11) is connected to the other side of the force sensor (10); A single-chip microcomputer is fixed in the rotating arm, and the force sensor (10) is electrically connected to the single-chip microcomputer; During the process of the stepper motor (8) driving the rotating arm to rotate, the centripetal force generated during the subsequent rotation of the weight acts on the force sensor (10) via the weight fixing rod (6), and the force sensor (10) transmits information to the single-chip microcomputer to accurately collect centripetal force experimental data.

2. According to claim 1, the wireless centripetal force tester is characterized in that The single chip microcomputer is electrically connected to a wireless sensor, and the single chip microcomputer transmits the centripetal force experimental data to the host computer through the wireless sensor.

3. According to claim 1, the wireless centripetal force tester is characterized in that A photoelectric gate is installed at one end of the rotating arm; the light emitting device in the photoelectric gate is installed below the end of the main body upper cover (5); the receiving device in the photoelectric gate is installed above the end of the main body lower cover (4), and the light emitting device and the receiving device are aligned in the longitudinal direction.

4. According to claim 3, the wireless centripetal force experiment device is characterized in that A photoelectric door baffle (7) is fixed above the end of the rotating bracket (3) that is away from the transmission shaft (12); during the rotation of the rotating arm, the light emitting device and the receiving device are driven to pass above and below the photoelectric door baffle (7), respectively, and the rotation speed of the rotating arm is measured by the photoelectric door baffle (7).

5. According to claim 4, the wireless centripetal force experiment device is characterized in that , the photoelectric gate baffle (7) comprises a base (71), and a baffle (72) in a right angle shape is formed on the top surface of the base (71); A light blocking sheet is provided on the blocking sheet (72); and the base (71) is fixed on the top surface of the rotating bracket (3).

6. According to claim 1, the wireless centripetal force tester is characterized in that The rotating bracket (3) comprises a supporting frame (31), and a connecting rod (32) is vertically fixed below the supporting frame (31); the connecting rod (32) is mounted on the base (1).

7. According to claim 3, the wireless centripetal force experiment device is characterized in that The main body lower cover (4) comprises a lower cover shell (41), a connecting pipe (42) is vertically fixed to the bottom of the lower cover shell (41), The transmission shaft (12) is installed in the connecting pipe (42) along the axial direction; the clip (44) is fixed inside the lower cover shell (41), and the clip (44) is used to fix the lower end of the force sensor (10); and a first fixing frame (43) is provided at one end of the lower cover shell (41).

8. According to claim 7, the wireless centripetal force experiment device is characterized in that The main body upper cover (5) comprises an upper cover outer shell (51), and a second fixing frame (52) is provided at one end of the upper cover outer shell (51); the first fixing frame (43) and the second fixing frame (52) are used for mounting the photoelectric gate.

9. The wireless centripetal force experiment device according to claim 1 is characterized in that The motor fixing bracket (2) comprises a first supporting portion (21), a second supporting portion (22) being fixed at one end of the first supporting portion (21); the stepping motor (8) is fixed in the first supporting portion (21); and the transmission shaft (12) is rotatably disposed in the second supporting portion (22).

10. The wireless centripetal force experiment device according to claim 1 is characterized in that , by adjusting the weight of the weight to generate a corresponding centripetal force, the experiment can be carried out under the action of the corresponding centripetal force.

Images