CN219533938U - Simple pendulum experimental device - Google Patents

Abstract

The utility model discloses a simple pendulum experiment device. The utility model comprises a bracket, a swing length ruler, a swing amplitude fine adjustment plate and a swing angle adjustment plate. The swing fine tuning plate is fan-shaped, is provided with an angle line of 0-10 degrees, and is provided with a bulge at the back corresponding to the position of 0 degrees; the swing length scale is movably connected with the fan-shaped circle center of the swing amplitude fine tuning plate, and a swing seat is arranged on the swing length scale. The swing angle adjusting plate is semicircular, seventeen grooves are formed in the same arc of the swing angle adjusting plate surface, and the protrusions of the swing angle fine adjusting plate correspond to the grooves in position. The swing length scale, the swing amplitude fine tuning plate and the swing angle adjusting plate are coaxially arranged in sequence, the included angle between the swing length scale and the swing amplitude fine tuning plate is changed by rotating the swing length scale, and the included angle between the swing amplitude fine tuning plate and the swing angle adjusting plate is changed by rotating the swing amplitude fine tuning plate; one end of the cycloid is fixed at one end of the pendulum length ruler, the other end of the cycloid is connected with a pendulum ball, and the pendulum ball corresponds to the pendulum ball seat in position. The utility model is convenient to read the swing length and the swing angle, saves the measurement time and improves the measurement precision.

Description

Single Pendulum Experimental Apparatus

technical field

The utility model belongs to the technical field of experimental equipment and relates to a simple pendulum experimental device, which can realize the measurement of the acceleration of gravity and study the relationship between the pendulum length and the period.

Background technique

The experiment of using a simple pendulum to measure the acceleration of gravity is one of the classic experiments in university physics experiments. By measuring the vibration period T and the pendulum length l, the experiment uses the formula Measure the acceleration due to gravity. The traditional experimental device that uses a single pendulum to measure the acceleration of gravity is not equipped with a pendulum length measurement component. The measurement of the pendulum length needs to be completed in two steps. First, use a centimeter ruler to measure the length of the rope, and then use a vernier caliper to measure the radius of the pendulum ball. Because one section of the cycloid has a fixed frame and the other end is connected to the small ball, it brings certain difficulties to accurately measure the pendulum length, and the measurement accuracy is insufficient, and the operation error is relatively large. One of the key links of the experiment is to control the swing angle to be less than 5 degrees. The existing experimental device is to straighten the cycloid to compare the swing angle. The existing swing scale can only realize the control of the swing angle within the range of ±15°, and cannot realize the control of the swing angle when the swing angle is greater than 15°, which limits the research scope of the experiment; and the curvature of the existing swing scale The radius is 1m, which takes up a lot of space, which is not conducive to placement and transportation.

Contents of the invention

The purpose of the utility model is to provide a simple pendulum experiment device for the deficiencies of the prior art.

The utility model comprises a bracket, a pendulum length ruler, a fine-tuning plate for a swing amplitude and a pendulum angle adjustment plate.

The support includes a base and a pole vertically arranged on the base, the base is set horizontally, and the upper surface of the base is adjusted to keep it horizontal through the horizontal adjustment screw below.

The swing fine-tuning plate is fan-shaped, with 0 ° ~ 10 ° angle line, the corresponding angle line is provided with an arc-shaped through groove, and a protrusion is arranged on the back of the swing amplitude fine-tuning plate corresponding to the 0 ° position; The scale position is movably connected with the fan-shaped center of the swing fine-adjustment plate, and the middle part of the pendulum length ruler and the swing width fine-adjustment plate are fixed by fastening screws passing through the arc-shaped through groove; the pendulum length ruler is provided with a swing ball seat.

The swing angle adjustment plate is semicircular and fixed on the pole; seventeen grooves are provided on the same arc of the swing angle adjustment plate, corresponding to -80°, -70°, -60° respectively , -50°, -40°, -30°, -20°, -10°, 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80° central angle , the protrusion of the swing fine-tuning plate corresponds to the position of the groove.

The pendulum length ruler, the swing amplitude fine-adjustment plate and the swing angle adjustment plate are arranged coaxially in sequence, the angle between the pendulum length ruler and the swing amplitude fine-adjustment plate can be changed by turning the pendulum length ruler, and the swing amplitude fine-adjustment plate and the swing angle can be changed by turning the swing amplitude fine-adjustment plate Adjust the included angle of the board; one end of the cycloid is fixed on one end of the pendulum length ruler, and the other end is connected with the pendulum ball, and the pendulum ball corresponds to the position of the pendulum ball seat.

The utility model adjusts the swing angle arbitrarily within -90°～+90° by changing the angle between the pendulum length ruler and the swing amplitude fine-tuning plate, and changing the angle between the swing amplitude fine-adjustment plate and the swing angle adjustment plate, and The pendulum length can be adjusted arbitrarily within the range of the ruler. The utility model is convenient to read the pendulum length and the pendulum angle, saves the measurement time and improves the measurement precision.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Figure 2 is a schematic diagram of the positions of the pendulum length ruler and the swing amplitude fine-tuning plate;

Fig. 3 is a schematic diagram of the positions of the fine-tuning plate for the swing amplitude and the adjusting plate for the swing angle.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.

As shown in Figures 1, 2 and 3, a simple pendulum experimental device includes a bracket, a pendulum length ruler, a swing amplitude fine-tuning plate and a pendulum angle adjusting plate.

The support includes a base 1 and a pole 2 vertically arranged on the base. The base 1 is set horizontally, and the upper surface of the base is adjusted to keep it level through the horizontal adjustment screw below.

The swing fine-adjustment plate 3 is fan-shaped, and is provided with 0°～10° angle lines, and an arc-shaped through groove 4 is opened corresponding to the angle lines, and a protrusion is arranged on the back of the swing amplitude fine-adjustment plate corresponding to the 0° position. The 0 scale position of the pendulum length ruler 5 is movably connected with the fan-shaped circle center of the swing fine-tuning plate 3, and the middle part of the pendulum length ruler 5 and the swing width fine-tuning plate 3 are fixed by the fastening screw 6 passing through the arc-shaped through groove 4. Pendulum length ruler 5 is provided with pendulous ball seat 7.

The swing angle adjustment plate 8 is semicircular and is fixedly arranged on the pole 2 . There are seventeen grooves 9 on the same arc on the swing angle adjustment plate, corresponding to -80°, -70°, -60°, -50°, -40°, -30°, -20°, - For central angles of 10°, 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, and 80°, the protrusion of the swing fine-tuning plate corresponds to the position of the groove 9 .

The pendulum length ruler 5, the swing amplitude fine-tuning plate 3 and the swing angle adjustment plate 8 are arranged coaxially in sequence, and the pendulum length ruler 5 is rotated to change the included angle between the pendulum length ruler 5 and the swing amplitude fine-adjustment plate 3, and locked by the locking screw, and then Make the swing amplitude fine-tuning plate 3 and the pendulum length ruler 5 make an angle between the swing angle adjustment plate 8 as a whole. When the protrusion falls into the groove, the positioning is realized. Every time a groove is moved, the swing angle increases or decreases by 10°.

One end of cycloid 10 is fixed on an end of pendulum long ruler, and the other end connects pendulum ball 11, and pendulum ball 11 is corresponding with pendulum ball seat 7 positions.

In the experiment, firstly, the pendulum angle will be fine-tuned within 0°~10° by turning the pendulum length ruler, and then the pendulum fine-adjustment plate will be turned to adjust the pendulum angle by integer multiples of 10° after locking, and then locked, so that the - The swing angle can be adjusted within 90°～+90°. Slide the pendulum ball seat to a certain position on the pendulum length ruler, place the pendulum ball on one side of the pendulum ball seat, tighten the cycloid, and fix the other end to obtain the pendulum length. Release the pendulum ball, the pendulum ball will naturally start to swing, and start timing at the same time. When it is necessary to change the pendulum length and re-measure, first adjust the pendulum ball seat to the specified position, and repeat the above operation. If the swing angle needs to be changed, readjust the angle between the pendulum length ruler and the swing fine-adjustment plate, and the angle between the swing fine-adjustment plate and the swing angle adjustment plate according to the above operations. The device can arbitrarily adjust the pendulum length within the range of the ruler, and can arbitrarily adjust the pendulum angle within the range of -90° to +90°.

Claims (1)

1. The simple pendulum experiment device comprises a bracket, a pendulum length scale, a pendulum amplitude fine adjustment plate and a pendulum angle adjustment plate; the method is characterized in that:

the bracket comprises a base and a supporting rod vertically arranged on the base, the base is horizontally arranged, and the upper surface of the base is adjusted to be horizontal through a horizontal adjusting screw below the base;

the swing fine tuning plate is fan-shaped, is provided with an angle line of 0-10 degrees, is provided with an arc through groove corresponding to the angle line, and is provided with a bulge at the back of the swing fine tuning plate corresponding to the position of 0 degrees; the 0 scale position of the swing length ruler is movably connected with the fan-shaped circle center of the swing length trimming plate, and the middle part of the swing length ruler is fixed with the swing length trimming plate through a fastening screw penetrating through the arc-shaped through groove; a swing ball seat is arranged on the swing length ruler;

the swing angle adjusting plate is semicircular and is fixedly arranged on the supporting rod; seventeen grooves are formed in the same circular arc of the swing angle adjusting plate surface, the central angles of-80 degrees, -70 degrees, -60 degrees, -50 degrees, -40 degrees, -30 degrees, -20 degrees, -10 degrees, -0 degrees, 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees and 80 degrees are respectively corresponding to the central angles, and the protrusions of the swing fine adjusting plate correspond to the positions of the grooves;

the swing length scale, the swing amplitude fine tuning plate and the swing angle adjusting plate are coaxially arranged in sequence, the included angle between the swing length scale and the swing amplitude fine tuning plate is changed by rotating the swing length scale, and the included angle between the swing amplitude fine tuning plate and the swing angle adjusting plate is changed by rotating the swing amplitude fine tuning plate; one end of the cycloid is fixed at one end of the pendulum length ruler, the other end of the cycloid is connected with a pendulum ball, and the pendulum ball corresponds to the pendulum ball seat in position.