Measuring device for measuring gravitational acceleration through simple pendulum method based on arduino mainboard

Abstract

The utility model discloses a measuring device for measuring gravitational acceleration by a simple pendulum method based on an arduino mainboard, which comprises a base, a support, a simple pendulum frame, a weight, a string and a measuring component capable of measuring a gravitational acceleration value through the simple pendulum of the weight, the support is arranged on one side of the base, the measuring component is positioned on the base, one end of the simple pendulum frame is arranged on the upper portion of the support, and the other end of the simple pendulum frame is arranged on the lower portion of the support. The upper end of the string is fixed on the single swing frame, and the lower end fixes the weight which is located in a measurement area above the base; the measuring assembly comprises a laser distance measuring sensor, a photoelectric sensor, an arduino mainboard, a switch button and an LCD (Liquid Crystal Display) screen for displaying experimental data; compared with the prior art, compared with a traditional simple pendulum method for measuring the gravitational acceleration, the steps are simpler, and the data reliability is high; according to the experiment, the pendulum length is measured through laser ranging, so that the pendulum length can be changed at will and is determined by an environment manually, the flexibility of the experiment is greatly improved, and the experiment is suitable for data measurement in various scenes and is more convenient and faster.

Description

Technical Field

[0001] The utility model relates to a measuring device for measuring gravity acceleration by a single pendulum method based on an Arduino mainboard. Background Art

[0002] The experimental principle of the simple pendulum method for measuring gravitational acceleration is based on the period formula of the simple pendulum. The gravitational acceleration is calculated by measuring the length and period of the simple pendulum. The experimental steps include making a simple pendulum (using a thin wire and a small ball with a hole), fixing the simple pendulum, measuring the length of the pendulum (including the distance from the suspension point to the center of the ball), measuring the time required for the simple pendulum to complete a full vibration, calculating the period, and finally substituting the measured pendulum length and period into the formula to calculate the gravitational acceleration.

[0003] In the existing single pendulum method experiment, the instruments used include millimeter ruler, vernier caliper, stopwatch, etc. These instruments are used to measure the length of the pendulum, the diameter of the ball, timing, etc. In the experiment, in order to reduce the error, it is usually necessary to measure multiple times and take the average value, while ensuring that the pendulum length and the diameter of the pendulum ball are as accurate as possible; this conventional method has the following defects: 1. The steps are complicated and the efficiency is poor; 2. The manually measured data is not accurate and the data error is large. Utility Model Content

[0004] In view of the above, the utility model provides a measuring device for measuring gravity acceleration using a single pendulum method based on an Arduino motherboard to solve the problems existing in the above-mentioned prior art.

[0005] According to one aspect of the utility model, a measuring device for measuring gravity acceleration by a single pendulum method based on an Arduino motherboard is provided, comprising a base, a bracket, a single pendulum frame, a weight, a thin rope, and a measuring component that can measure the value of gravity acceleration by a single pendulum with the weight, wherein the bracket is arranged on one side of the base, the measuring component is located on the base, one end of the single pendulum frame is arranged on the upper part of the bracket, the upper end of the thin rope is fixed on the single pendulum frame, the lower end is fixed with a weight, and the weight is located in a measuring area above the base;

[0006] The measuring component comprises a laser distance measuring sensor for calculating the pendulum length of the weight during swinging, a photoelectric sensor for measuring the time when the weight passes through the lowest point twice, an Arduino mainboard, a switch button, and an LCD display screen for displaying experimental data. The photoelectric sensor is arranged at the middle position of the base surface and corresponds to the lowest point position of the weight in a static state. The laser distance measuring sensor is arranged at the middle position of one side of the base surface. The Arduino mainboard and the LCD display screen are arranged at both sides of the base surface respectively. The switch button is arranged on the base surface. The photoelectric sensor and the distance measuring sensor are both connected to the information processing port of the Arduino mainboard, and the LCD display screen is connected to the information output port of the Arduino mainboard.

[0007] Preferably, an adjustable single-swing frame height adjustment component is provided at the connection between the single-swing frame and the bracket.

[0008] Preferably, the adjustment assembly includes a bow-shaped steel component and a screw, the opening of the bow-shaped steel component corresponds to the upper part of the bracket, one side of the bow-shaped steel component is fixed with the single swing frame, and the other side is provided with a screw hole allowing the screw to pass through, the screw is fixed in the screw hole, and the end of the screw is in contact with the surface of the bracket.

[0009] Preferably, the single-swing frame is also provided with a long strip through hole and a fixing component which can fix the thin rope and adjust the position of the thin rope, and the fixing component is connected in the long strip through hole.

[0010] Preferably, the fixing assembly includes a sub-buckle, a female buckle, and a rope ring for fixing a thin rope, the sub-buckle is located below the elongated through hole, the female buckle is located above the elongated through hole, and the rope ring is located at the lower end of the sub-buckle.

[0011] The beneficial effects of the utility model are:

[0012] 1. Compared with the traditional single pendulum method to measure gravity acceleration, the steps are simpler and the data reliability is higher.

[0013] 2. This experiment uses laser ranging to measure the pendulum length, so the length of the pendulum can be changed at will and is determined by the environment. Therefore, the flexibility of the experiment is greatly increased to adapt to the measurement of data in various scenarios, which is more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] In the figure, 1. base; 2. bracket; 3. single pendulum frame; 4. laser ranging sensor; 5. photoelectric sensor; 6. Arduino mainboard; 7. switch button; 8. LCD display; 9. bow-shaped steel part; 10. screw; 11. long strip through hole; 12. female buckle; 13. male buckle; 14. rope ring; 15. thin rope; 16. weight. DETAILED DESCRIPTION

[0016] The utility model is further described below with reference to the accompanying drawings and some embodiments.

[0017] Figure 1 In the present invention, a measuring device for measuring gravity acceleration by a single pendulum method based on an Arduino mainboard comprises a base 1, a bracket 2, a single pendulum frame 3, a weight 16, a thin rope 15, and a measuring component capable of measuring the value of gravity acceleration by a single pendulum of the weight 16. The bracket 2 is arranged at one side of the base 1, the measuring component is located on the base 1, one end of the single pendulum frame 3 is arranged at the upper part of the bracket 2, the upper end of the thin rope 15 is fixed on the single pendulum frame 3, the lower end is fixed with the weight 16, and the weight 16 is located in the measuring area above the base 1;

[0018] The measuring component includes a laser distance measuring sensor 4 for calculating the pendulum length of the weight 16 during its swing, a photoelectric sensor 5 for measuring the time it takes the weight 16 to pass through the lowest point twice, an Arduino mainboard 6, a switch button 7, and an LCD display screen 8 for displaying experimental data. The photoelectric sensor 5 is arranged in the middle position of the surface of the base 1 and corresponds to the lowest point position of the weight 16 in a static state. The laser distance measuring sensor 4 is arranged in the middle position of one side of the surface of the base 1. The Arduino mainboard 6 and the LCD display screen 8 are respectively arranged on both sides of the surface of the base 1. The switch button 7 is arranged on the surface of the base 1. The photoelectric sensor 5 and the distance measuring sensor are both connected to the information processing port of the Arduino mainboard 6, and the LCD display screen 8 is connected to the information output port of the Arduino mainboard 6. The data displayed on the LCD display screen 8 include the time t when the weight 16 passes through the photoelectric sensor 5 twice, the pendulum length L, the period T, and the gravitational acceleration g, etc.

[0019] In this embodiment, an adjustable height adjustment component of the single pendulum frame 3 is provided at the connection between the single pendulum frame 3 and the bracket 2; the adjustment component includes a bow-shaped steel component 9 and a screw 10, the opening of the bow-shaped steel component 9 corresponds to the upper part of the bracket 2, one side of the bow-shaped steel component 9 fixes the single pendulum frame 3, and the other side is provided with a screw hole allowing the screw 10 to pass through, the screw 10 is fixed in the screw hole, and the end of the screw 10 is in contact with the surface of the bracket 2; the height of the weight 16 can be adjusted according to actual conditions, and the vertical position of the weight 16 can be adjusted by separating the screw 10 from the surface of the bracket 2, and the vertical position of the weight 16 can be fixed by locking the screw 10 on the surface of the bracket 2.

[0020] In this embodiment, the single pendulum frame 3 is also provided with a long strip through hole 11 and a fixing component that can fix the thin rope 15 and adjust the position of the thin rope 15, and the fixing component is connected to the long strip through hole 11; the fixing component includes a sub-buckle 13, a female buckle 12, and a rope ring 14 for fixing the thin rope 15, the sub-buckle 13 is located below the long strip through hole 11, the female buckle 12 is located above the long strip through hole 11, and the rope ring 14 is located at the lower end of the sub-buckle 13; when fixing, the upper end of the sub-buckle 13 is passed through the long strip through hole 11 and fixed to the female buckle 12, and the removal of the weight 16 can be completed by separating the female buckle 12 and the sub-buckle 13.

[0021] In this embodiment, the laser ranging sensor 4 adopts a laser ranging sensor 4 of a model such as VL53L0X, HG-C1030, etc., and uses the time of flight (ToF) principle to realize the ranging application by calculating the round-trip flight time of photons and the speed of light.

[0022] In the specific implementation of this embodiment, the switch button 7 is pressed to make the weight 16 do a simple pendulum motion, and the data on the LCD display screen 8 is observed. When the weight 16 passes through the photoelectric sensor 5 for the first time, t starts to count, and when the weight 16 passes through the photoelectric sensor 5 for the second time, t ends, and one measurement is completed. Until the next time the weight 16 passes through the photoelectric sensor 5, t will be reset and re-counted to start a new round of measurement. When one measurement is completed, the switch button 7 is pressed to stop the experiment, and the data displayed on the LCD is the data of the last measurement. Press the switch button 7 again to continue the experiment.

[0023] In this embodiment, the control circuit of the utility model is a common circuit in the circuit field. The device of the utility model can be connected to an external power supply or a built-in battery through a power cord to provide power for the device. Technicians in the relevant technical field can implement it and will not be elaborated here.

[0024] It is worth noting that: in the description of the present utility model, the meaning of "multiple" is two or more than two, unless otherwise clearly and specifically defined. In the present utility model, unless otherwise clearly specified and defined, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; the circuits described in the present utility model are all commonly used circuits in the field, and other related components are all existing commonly used components. For ordinary technicians in the field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A measuring device for measuring gravity acceleration using a single pendulum method based on an Arduino motherboard, characterized in that: It includes a base, a bracket, a pendulum frame, a weight, a thin rope, and a measuring component that can measure the value of gravity acceleration through a single pendulum with a weight. The bracket is arranged on one side of the base, the measuring component is located on the base, one end of the pendulum frame is arranged on the upper part of the bracket, the upper end of the thin rope is fixed on the pendulum frame, the lower end is fixed with a weight, and the weight is located in the measuring area above the base; The measuring component comprises a laser distance measuring sensor for calculating the pendulum length of the weight during swinging, a photoelectric sensor for measuring the time when the weight passes through the lowest point twice, an Arduino mainboard, a switch button, and an LCD display screen for displaying experimental data. The photoelectric sensor is arranged at the middle position of the base surface and corresponds to the lowest point position of the weight in a static state. The laser distance measuring sensor is arranged at the middle position of one side of the base surface. The Arduino mainboard and the LCD display screen are arranged at both sides of the base surface respectively. The switch button is arranged on the base surface. The photoelectric sensor and the distance measuring sensor are both connected to the information processing port of the Arduino mainboard, and the LCD display screen is connected to the information output port of the Arduino mainboard.

2. The measuring device for measuring gravity acceleration by a single pendulum method based on an Arduino motherboard according to claim 1, characterized in that: An adjustable single-swing frame height adjustment component is provided at the connection between the single-swing frame and the bracket.

3. The measuring device for measuring gravity acceleration by a single pendulum method based on an Arduino mainboard according to claim 2, characterized in that: The adjustment assembly includes an arched steel component and a screw. The opening of the arched steel component corresponds to the upper part of the bracket. The single swing frame is fixed on one side of the arched steel component, and a screw hole allowing the screw to pass through is provided on the other side. The screw is fixed in the screw hole, and the end of the screw contacts the surface of the bracket.

4. The measuring device for measuring gravity acceleration by a single pendulum method based on an Arduino mainboard according to claim 2, characterized in that: The single-swing frame is also provided with a long strip through hole and a fixing component which can fix the thin rope and adjust the position of the thin rope, and the fixing component is connected in the long strip through hole.

5. The measuring device for measuring gravity acceleration by a single pendulum method based on an Arduino mainboard according to claim 4, characterized in that: The fixing assembly comprises a sub-buckle, a female buckle, and a rope ring for fixing a thin rope, wherein the sub-buckle is located below the long strip through hole, the female buckle is located above the long strip through hole, and the rope ring is located at the lower end of the sub-buckle.

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