CN112802382A - Remote-controlled gravity acceleration physical experiment system - Google Patents
Remote-controlled gravity acceleration physical experiment system Download PDFInfo
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- CN112802382A CN112802382A CN202110145085.2A CN202110145085A CN112802382A CN 112802382 A CN112802382 A CN 112802382A CN 202110145085 A CN202110145085 A CN 202110145085A CN 112802382 A CN112802382 A CN 112802382A
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Abstract
The invention discloses a remote-controlled gravity acceleration physical experiment system which comprises an experiment body, a control communication module and remote equipment, wherein the experiment body comprises a base, a supporting rod, a block, a support transmission device, a measuring assembly and a reset assembly. The reset assembly comprises a sending device, a collecting device and a reset transmission device, and is used for releasing the free falling of the object blocks, receiving the falling object blocks and enabling the object blocks to be restored to the initial positions. The control communication module is electrically connected with the experiment body and used for controlling the experiment body to perform experiment operation, receiving and storing experiment data and communicating with remote equipment. According to the technical scheme disclosed by the invention, the reset component and the control communication module are introduced into the traditional gravity acceleration experiment system, so that the system can be remotely controlled, and a user can carry out physical experiment operation of the gravity acceleration through a network at any place.
Description
Technical Field
The invention belongs to the technical field of experimental equipment, and particularly relates to a remote-control gravity acceleration physical experiment system.
Background
The gravitational acceleration g is an important physical quantity in physics, and is influenced by factors such as the latitude, the altitude and the geological structure of the position where the object is located. Therefore, g values are generally different in different regions. The g value measuring method of the college physical experiment comprises a single pendulum method, a free falling body motion method, an inclined air cushion rail method, a balance method and the like.
In the prior art, a server and terminal equipment for remote experiments are described, but the removability of the experiments is not discussed, and particularly, the complicated experiment equipment building and operation of college physical experiments make the remotization difficult.
Disclosure of Invention
The invention provides a remote-controlled physical experiment system for gravitational acceleration, which aims to overcome the defects and solve the problem that the traditional physical experiment system for gravitational acceleration can be operated repeatedly in a remote mode, so that an experimenter can conveniently obtain real experiment data through physical experiments of network operation entities.
In order to solve the problems, the invention adopts the following technical scheme:
a remotely controllable gravitational acceleration physical experiment system comprises an experiment body, a control communication module and remote equipment, wherein the experiment body comprises: the base, bracing piece, thing piece, support transmission, measuring component and reset assembly. The supporting rod is fixedly arranged on the base, and the supporting rod is arranged in the vertical direction. The device comprises at least two measuring assemblies, wherein each measuring assembly comprises a support and a plurality of sensors, the supports are arranged on the supporting rods, the sensors are fixedly arranged on the supports, at least one support is connected to a support transmission device, and the support transmission device drives the supports to move along the supporting rods. The reset assembly is electrically connected with the control communication module and is used for receiving an instruction to reset the object block; the reset assembly comprises a sending device, a collecting device and a reset transmission device; the sending device is arranged on the supporting rod and used for keeping the object block at an initial position and releasing the object block to fall freely according to an instruction; the collecting device is arranged on the supporting rod and provided with an upward opening for receiving falling object blocks; the reset transmission device is fixedly arranged on the base and can reset the object block by moving at least one of the sending device, the collecting device and the object block. The control communication module is electrically connected with the experiment body, and is used for controlling the experiment body to perform experiment operation, receiving and storing experiment data and communicating with remote equipment.
Preferably, the support rod is provided with scales, each measuring assembly further comprises an image recorder, each image recorder is fixedly arranged on each support, and each image recorder is used for collecting scale information of the support on the support rod corresponding to the image and sending the scale information to the control communication module.
In particular, the collecting device is provided with a bottom for resting falling pieces in the collecting device. The sending device is connected with the reset transmission device, and the reset transmission device drives the sending device to move along the supporting rod.
In particular, the collecting device is provided with a bottom for resting falling pieces in the collecting device. The collecting device is connected with the reset transmission device, and the reset transmission device drives the collecting device to move along the supporting rod.
Preferably, an opening is arranged at the bottom of the collecting device and used for outputting the received object blocks to the reset transmission device. The reset transmission device is provided with an inlet end and an outlet end, the inlet end is communicated with the collecting device, and the outlet end is communicated with the sending device.
Specifically, the reset transmission device comprises a spiral slide and a climbing wall, the climbing wall is tangent to the outer edge of the spiral slide, the inlet end and the outlet end are arranged on the climbing wall, the outlet end is provided with a flange, and the flange extends to the sending device.
Furthermore, the system also comprises a monitoring device, wherein the monitoring device is used for carrying out real-time image acquisition on the experimental process, acquiring experimental panoramic data and sending the experimental panoramic data to the control communication module.
Preferably, the system further comprises a pipe shell, the axis of the pipe shell is vertical, and the lower end of the pipe shell is arranged on the base in a closed mode; the tube shell wall is made of transparent material; the sending device and the collecting device are arranged in the pipe shell, and the measuring component is arranged outside the pipe shell; the pipe shell is provided with a notch, and the sending device or the collecting device is connected with the reset transmission device through the notch.
Preferably, the sending means comprises an electromagnet assembly, the mass being made of a magnetic material.
Preferably, the collecting device further comprises a buffer body, and the buffer body is made of an elastic material or is of a soft net structure.
Preferably, the sensor comprises a photogate for timing and/or speed measurement and for sending the acquired data to the control communication module.
Preferably, the stand transmission comprises a screw or pulley arrangement.
From the above, the technical scheme provided by the invention has the beneficial effects that:
1) one of the measuring components is driven to move along the supporting rod through the bracket transmission device, so that the problem of remote control of distance change in the gravity acceleration test by a free fall method is solved;
2) the instantaneous speed is measured by the sensor, so that the experiment for measuring the gravity acceleration by the free fall method does not need to read spatial information, and the system is simplified;
3) the reset of the initial position of the falling object block is realized through different moving modes of the reset assembly, so that the gravity acceleration experiment can be repeatedly operated in a remote range;
4) the problem of the collection of falling thing piece is solved, make the acceleration of gravity experiment system need not artificial intervention just can realize stable remote operation.
Drawings
FIG. 1 is a schematic structural diagram of an A-type experimental body according to the present invention;
FIG. 2 is an enlarged view of a part of the structure of an A-type experimental body according to the present invention;
FIG. 3 is a schematic structural diagram of a type B experimental body according to the present invention;
FIG. 4 is a schematic structural diagram of a type C experimental body according to the present invention;
FIG. 5 is a schematic structural diagram of an experimental body with a tube shell according to the present invention;
FIG. 6 is a block circuit diagram of an embodiment of the present invention.
The reference signs are:
1. a base; 2. a support bar; 3. a carriage transmission; 4. a measurement assembly; 5. a spiral slide; 6. a transmitting device; 7. a collection device; 8. a screw rod; 9. a material block; 10. climbing a wall; 41. a first measurement assembly; 42. a second measurement assembly; 11. a pipe shell; 12. a flange.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the embodiments of the present invention is provided with examples. It should be understood that the examples described herein are only for the purpose of illustrating the present invention, and are not intended to limit the scope of the present invention.
The invention discloses a remote-controlled gravity acceleration physical experiment system which comprises an experiment body, a control communication module and remote equipment.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of an a-type experimental body of the present invention, and it can be seen that the experimental body includes: the device comprises a base 1, a support rod 2, an object block 9, a support transmission device 3, a measuring component 4 and a reset component; the support rod 2 is fixedly arranged on the base 1, and the support rod 2 is arranged along the vertical direction. The control communication module comprises a main control chip and a logic circuit board, is electrically connected with the experiment body, is used for controlling the experiment body to perform experiment operation, receiving and storing experiment data, and is also used for communicating with remote equipment.
In the embodiment of the present invention, the measuring units 4 are preferably two, a first measuring unit 41 and a second measuring unit 42, the first measuring unit 41 being located near the top of the support bar 2. In other embodiments, there may be a plurality of measuring units 4. In the embodiment of the present invention, the support rod 2 is provided with scales, each measuring assembly 4 includes a bracket, an image recorder and a sensor, the sensor is a photo gate sensor, and the first photo gate and the second photo gate respectively correspond to the first measuring assembly 41 and the second measuring assembly 42. The image recorder and the photoelectric door are fixedly arranged on the bracket. The support of the first measuring component 41 is connected to the support transmission device 3, and is driven by the support transmission device 3 to move along the support rod 2, so as to change the vertical distance between the two measuring components. In the present embodiment, the support transmission 3 comprises a pulley structure, and the pulley is driven by a stepping motor to rotate. In other embodiments, the pulley structure may be a screw structure. In the embodiment of the present invention, when the first photo gate detects the object 9, the control communication module is triggered to start timing, and when the second photo gate detects the object 9, the control communication module is triggered to stop timing, so as to obtain a time interval when the object 9 passes through the first measuring component 41 and the second measuring component 42. In the embodiment of the invention, the image acquisition instrument is used for acquiring scale information of the corresponding support on the support rod 2 and sending the information to the control communication module. In the embodiment of the invention, the local gravitational acceleration is calculated by acquiring the vertical distance between the first measuring component 41 and the second measuring component 42 and the time interval of the object 9 passing through the two measuring components. The specific calculation process is as follows:
in this embodiment, assuming that the vertical distance between the two measuring units 4 is s, the speed at which the mass 9 falls from the initial position to the first measuring unit 41 is v1The time interval of the object 9 falling from the first measuring component 41 to the second measuring component 42 is t, and the uniform acceleration linear motion law can obtain
Dividing both sides by t to obtain
Let x be t which is the sum of t,
is provided with
The formula is a slope of
The gravity acceleration g can be obtained by measuring different values of s and t and performing linear fitting on x and y according to the linear equation. Generally, 5-8 corresponding t values are measured for one s value, and an average value is taken.
The resetting component is electrically connected with the control communication module, and when the free falling motion of the object block 9 is finished each time, the resetting component automatically or through the instruction control of the control communication module to pick up the object block 9, resets the object block 9 to the initial position, and waits for the new instruction of the control communication module to release the object block 9 to fall freely. The reset assembly comprises a sending device 6, a collecting device 7 and a reset transmission device. The sending device 6 is arranged on the supporting rod 2 and used for keeping the object block 9 at an initial position and releasing the object block 9 to fall freely according to instructions; the collecting device 7 is arranged on the supporting rod 2, and the collecting device 7 is provided with an upward opening and is used for receiving the falling object block 9; the reset transmission device is fixedly arranged on the base 1 and resets the object block 9 by moving at least one of the sending device 6, the collecting device 7 and the object block 9.
Specifically, referring to fig. 2, fig. 2 is an enlarged view of the structure of the portions a, b, and c of fig. 1 according to the present invention. In the present embodiment, the bottom of the collecting device 7 is provided with an opening for outputting the received mass 9 to the reset transmission. The reset transmission device is provided with an inlet end and an outlet end, the inlet end is communicated with the collecting device 7, and the outlet end is communicated with the sending device 6. Specifically, referring to fig. 2, the reset transmission device comprises a spiral slide 5 and a climbing wall 10, wherein the climbing wall 10 is tangent to the outer edge of the spiral slide 5, the inlet end is communicated with the bottom of the collecting device 7, and the object 9 is output from the bottom of the collecting device 7 to enter the spiral slide 5. The spiral slide 5 moves the mass 9 upwards by a rotary motion, see c1 and c2 of fig. 2, under the effect of the climbing wall 10. In particular, in the embodiment of the present invention, the plurality of the articles 9 are respectively distributed at different heights of the spiral slide 5, and move upwards synchronously with the rotation of the spiral slide 5, so that the time interval between two experiments can be shortened, and the waiting time for resetting the articles 9 can be saved, as shown in fig. 2 (b). The outlet end of the climbing wall 10 communicates with the sending device 6, which in the present embodiment of the invention comprises an electromagnet assembly, the mass 9 being made of magnetic material. The outlet end of climbing wall 10 is provided with a flange 12, and flange 12 extends to the center of the electromagnet assembly to guide the reset of mass 9 to the initial position, see a1 and a2 in fig. 2.
In the embodiment of the present invention, the sending device 6 may also include a steering engine brake, and the steering engine brake is disposed on the top of the support rod 2. The steering engine brake gate is two hemispherical spherical shells, when the gate is closed, the object block 9 is placed at the initial position and is static, and when the gate is opened, the object block 9 is released to fall freely. The rudder machine gate is electrically connected with the control communication module and used for receiving instructions to control the opening and closing of the gate.
In the embodiment of the present invention, the collecting device 7 further includes a buffering body, and the buffering body is made of an elastic material or has a soft mesh structure.
In addition, the remotely-controllable gravitational acceleration experiment system disclosed by the invention further comprises a monitoring device, wherein the monitoring device is used for carrying out real-time image acquisition on the experiment process, acquiring experiment panoramic data and sending the experiment panoramic data to the control communication module. And the user confirms that the acquired experimental data are valid data by checking the experimental panoramic data, otherwise, abandons the data, and informs an administrator to maintain the system.
In this embodiment, the master control chip adopts Raspberry Pi Camera Pi 4B, the stepping motor adopts 42BYGH34-401A, the model of the steering engine is MG996R, the electromagnet assembly adopts a DC24V rectangular electromagnet, the sensor adopts a correlation photoelectric switch NPN three-wire normally open type, the effective distance is 30cm, and the image acquisition instrument for reading the scale information of the stent adopts a Raspberry Pi Camera V2 standard version Camera.
Example two
On the basis of the system structure of the first embodiment, the scales on the supporting rod 2 and the image acquisition instruments of the measuring components 4 are deleted, and the instantaneous speed and the time interval of the object block 9 passing through the measuring components 4 are obtained by adding a sensor for measuring the speed, so that the gravity acceleration is calculated. Compared with the first embodiment, the first embodiment of the invention does not need to measure the spatial distance of each measuring assembly 4, simplifies the device and is more convenient to operate. The specific calculation process is as follows:
suppose the instantaneous velocity v of the mass 9 passing through the first and second measuring assemblies 41 and 42, respectively1And v2The time interval for the mass 9 to fall from the first measuring assembly 41 to the second measuring assembly 42 is t, which can be obtained from the law of motion of free fall
v2-v1＝gt
By measuring different t values and instantaneous speed difference v2-v1And performing straight line fitting on the obtained implementation data to obtain the gravity acceleration g. Other structures of this embodiment are the same as those of the first embodiment, and are not described herein again.
EXAMPLE III
Referring to fig. 3, fig. 3 is a schematic structural diagram of a type B experimental body according to the present invention. The embodiment of the present invention is a modification made on the basis of the first embodiment or the second embodiment. Specifically, the collecting device 7 in the embodiment of the present invention is provided with a bottom for standing the falling object 9 in the collecting device 7, and the sending device 6 is connected to the reset transmission device, and the reset transmission device drives the sending device 6 to move along the support rod 2. Specifically, the sending device 6 is an electromagnet assembly, the reset transmission device comprises a screw rod 8, the electromagnet assembly is in threaded connection with the screw rod 8, the screw rod 8 is driven by a stepping motor, and the screw rod 8 drives the electromagnet assembly to move up and down along the support rod 2 through rotation. When the object 9 falls and stands still in the collecting device 7, the electromagnet assembly moves the adsorbed object 9 downwards along the supporting rod 2 and moves upwards along the supporting rod 2 to the top end of the supporting rod 2, so that the object 9 is reset to the initial position. The reset transmission device of the embodiment can also be in a belt pulley structure. Other parts of this embodiment that have the same structure as the embodiment are not described again.
Example four
Referring to fig. 4, fig. 4 is a schematic structural diagram of a type C experimental body according to the present invention. The embodiment of the invention is a modification made on the basis of the third embodiment. The collecting device 7 is connected with a reset transmission device, and the reset transmission device drives the collecting device 7 to move along the supporting rod 2. When the object 9 falls and stops in the collecting device 7, the reset transmission device drives the collecting device 7 and the object 9 to move upwards along the supporting rod 2, and the object 9 is supported to be close to the sending device 6. In this embodiment, the sending device 6 includes an electromagnet assembly, the electromagnet adsorbs the object 9 to reset the object 9 to the initial position, and the reset transmission device moves the collecting device 7 down to the bottom end of the supporting rod 2 again to wait for a new experiment. Other parts in this embodiment that are the same as the third structure or function in this embodiment will not be described again.
EXAMPLE five
Referring to fig. 5, fig. 5 is a schematic structural diagram of an experimental body with a tube housing 11 according to the present invention. The experimental body structure of the embodiment of the invention is modified on the basis of the third embodiment. Specifically, the embodiment of the invention further comprises a pipe shell 11, the pipe shell 11 is fixedly arranged on the base 1, the axis of the pipe shell 11 is vertical, the sending device 6 and the collecting device 7 are both arranged in the pipe shell 11, the measuring component 4 is arranged outside the pipe shell 11, the wall of the pipe shell 11 is transparent, a notch is arranged on the wall of the pipe shell 11, the sending device 6 and/or the collecting device 7 are connected with the reset transmission device through the notch and driven by the reset transmission device to move up and down along the pipe shell 11 so as to complete the reset of the initial position of the object block 9. Other parts in the embodiment which have the same structure as the third embodiment are not described again.
In addition, referring to fig. 6, fig. 6 is a circuit block diagram of an embodiment of the present invention, it can be seen that the control communication module takes a raspberry pi as a core, and the raspberry pi includes a communication unit and a storage unit, wherein the communication unit is used for communicating with a remote device, and the storage unit is used for storing experimental data. Other peripheral equipment is connected with the raspberry pie, wherein the electromagnet is powered by a universal power supply DC24V and is controlled by a relay, and the relay is connected with 1 universal port of the raspberry pie; the correlation NPN photoelectric switch is powered by a universal power supply DC5V, and a signal end is connected with 1 universal port of the raspberry pi; the raspberry pi standard camera is connected with a raspberry pi camera CSI interface; the steering engine is connected with 1 universal port of the raspberry pi and is controlled by duty ratio; the stepping motor controller is powered by a universal power supply DC12V, and a control end is connected with 3 universal ports of the raspberry pie; the stepping motor is connected with the stepping motor controller and is controlled by the stepping motor controller. The universal power supply is directly connected to the mains supply and respectively outputs DC24V, DC12V and DC 5V; the raspberry group is connected with a power supply end of the raspberry group through a Type-C interface of the power adapter.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (13)
1. A remote-controlled physical experiment system for gravitational acceleration comprises an experiment body, a control communication module and a remote device,
the experiment body comprises: the device comprises a base, a support rod, an object block, a support transmission device, a measuring assembly and a reset assembly;
the supporting rod is fixedly arranged on the base and is arranged along the vertical direction;
the device comprises at least two measuring assemblies, a supporting rod and a plurality of sensors, wherein each measuring assembly comprises a bracket and a plurality of sensors, the brackets are arranged on the supporting rod, the sensors are fixedly arranged on the brackets, at least one bracket is connected with a bracket transmission device, and the bracket transmission device drives the bracket transmission device to move along the supporting rod;
the reset assembly is electrically connected with the control communication module and is used for receiving an instruction to reset the object block; the reset assembly comprises a sending device, a collecting device and a reset transmission device; the sending device is arranged on the supporting rod and used for keeping the object block at an initial position and releasing the object block to fall freely according to an instruction; the collecting device is arranged on the supporting rod and provided with an upward opening for receiving falling object blocks; the reset transmission device is fixedly arranged on the base and realizes the reset of the object block by moving at least one of the sending device, the collecting device and the object block;
the control communication module is electrically connected with the experiment body, and is used for controlling the experiment body to perform experiment operation, receiving and storing experiment data and communicating with remote equipment.
2. The gravitational acceleration physical experiment system of claim 1, wherein the support rods are provided with scales, each of the measurement assemblies further comprises an image recorder, each of the image recorders is fixedly arranged on each of the supports, and each of the image recorders is used for image-collecting scale information corresponding to the support on the support rod and sending the scale information to the control communication module.
3. The gravitational acceleration physical experiment system of claim 1, wherein the collecting device is provided with a bottom for resting falling objects in the collecting device; the reset transmission device comprises a spiral screw rod or belt pulley structure, the spiral screw rod or belt pulley structure is controlled by a stepping motor, and the stepping motor is electrically connected with the control communication module.
4. The gravitational acceleration physical experiment system of claim 3, wherein the sending device is connected to the reset transmission device, and the reset transmission device drives the sending device to move along a support rod.
5. The gravitational acceleration physical experiment system of claim 3, wherein the collecting device is connected to the reset transmission device, and the reset transmission device drives the collecting device to move along a support rod.
6. The gravitational acceleration physical experiment system of claim 1, wherein an opening is provided at the bottom of the collecting device for outputting the received object to the reset transmission device; the reset transmission device is provided with an inlet end and an outlet end, the inlet end is communicated with the collecting device, and the outlet end is communicated with the sending device.
7. The gravitational acceleration physical experiment system of claim 6, wherein the reset transmission device comprises a spiral slide and a climbing wall, the climbing wall is tangent to an outer edge of the spiral slide, the inlet end and the outlet end are disposed on the climbing wall, the outlet end is provided with a flange, and the flange extends to the sending device.
8. The gravitational acceleration physical experiment system of any one of claims 1 to 7, further comprising a monitoring device, wherein the monitoring device is configured to perform real-time image acquisition on an experiment process, obtain experiment panoramic data, and send the experiment panoramic data to the control communication module.
9. The gravitational acceleration physical experiment system according to any one of claims 1 to 7, further comprising a pipe shell, wherein the axis of the pipe shell is vertical, and the lower end of the pipe shell is arranged on the base in a closed manner; the tube shell wall is made of transparent material; the sending device and the collecting device are arranged in the pipe shell, and the measuring component is arranged outside the pipe shell; the pipe shell is provided with a notch, and the sending device or the collecting device is connected with the reset transmission device through the notch.
10. The gravitational acceleration physical experiment system according to any one of claims 1 to 7, wherein the sending device comprises an electromagnet assembly, and the mass is made of a magnetic material.
11. The gravitational acceleration physical experiment system according to any one of claims 1 to 7, wherein the collecting device further comprises a buffer body, and the buffer body is made of an elastic material or is a soft mesh structure.
12. The gravitational acceleration physical experiment system according to any one of claims 1 to 7, wherein the sensor comprises a photoelectric gate for timing and/or speed measurement and for sending acquired data to the control communication module.
13. The gravitational acceleration physical experiment system of any one of claims 1 to 7, wherein the rack transmission comprises a screw or pulley structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110145085.2A CN112802382A (en) | 2021-02-02 | 2021-02-02 | Remote-controlled gravity acceleration physical experiment system |
| PCT/CN2022/074722 WO2022166834A1 (en) | 2021-02-02 | 2022-01-28 | Remotely controllable gravitational acceleration physical experiment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110145085.2A CN112802382A (en) | 2021-02-02 | 2021-02-02 | Remote-controlled gravity acceleration physical experiment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022166834A1 (en) * | 2021-02-02 | 2022-08-11 | 中国人民解放军国防科技大学 | Remotely controllable gravitational acceleration physical experiment system |
| WO2023051425A1 (en) * | 2021-09-29 | 2023-04-06 | 中国人民解放军国防科技大学 | Electromechanical control system for free fall experiment |
-
2021
- 2021-02-02 CN CN202110145085.2A patent/CN112802382A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022166834A1 (en) * | 2021-02-02 | 2022-08-11 | 中国人民解放军国防科技大学 | Remotely controllable gravitational acceleration physical experiment system |
| WO2023051425A1 (en) * | 2021-09-29 | 2023-04-06 | 中国人民解放军国防科技大学 | Electromechanical control system for free fall experiment |
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