A sound velocity measuring instrument for physics teaching experiment

Abstract

This invention relates to the field of sound velocity measuring instruments and discloses a sound velocity measuring instrument for physics teaching experiments. The instrument includes a base plate with symmetrically distributed sliding grooves at its upper end. A measuring body is slidably connected to the left end of each sliding groove, and a reflective baffle is slidably connected to the right end. In this sound velocity measuring instrument for physics teaching experiments, the measuring body moves on the base plate, causing the sliding plate to move along with it. The sliding plate, in conjunction with a sliding rod, drives a rolling wheel to slide within the sliding groove. This movement of the rolling wheel within the sliding groove ensures the stability of the measuring body during movement, preventing deviation and thus avoiding skewness in the sound waves generated by the ultrasonic device. Before measurement, the reflective baffle needs to be moved and adjusted. After moving to the appropriate position, the reflective baffle needs to be fixed. This is achieved by inserting a limiting rod on the fixing rod into a limiting groove, thus achieving a stable fixation.

Description

Technical Field

[0001] This invention relates to the field of sound velocity measuring instruments, specifically a sound velocity measuring instrument for use in physics teaching experiments. Background Technology

[0002] Sound waves are longitudinal waves that propagate in an elastic medium. With the rapid development of acoustic research, acoustic testing has become increasingly widespread in practical applications, and the measurement of the speed of sound propagation has become of great significance. Currently, the main methods used to measure the speed of sound are the standing wave method (also called the resonance interferometry method) and the phase comparison method. These two methods are also used in physics teaching.

[0003] However, the current sound velocity measuring device used in physics teaching experiments has a fixed height that cannot be adjusted, which causes a deviation between the measured value and the reading during the reading process, ultimately leading to data deviation and affecting the experimental results. Moreover, in order to avoid backlash during the measurement process, it can only move in one direction, but there will still be some deviation during the movement. Therefore, in view of the above problems, there is an urgent need for a sound velocity measuring instrument that can measure accurately. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a sound velocity measuring instrument for physics teaching experiments. It provides accurate measurement results and reduces errors caused by backlash, thus solving the problem of large errors in existing sound velocity measuring instruments used in physics teaching.

[0006] (II) Technical Solution

[0007] To achieve accurate measurement results and reduce errors caused by backlash, this invention provides the following technical solution: a sound velocity measuring instrument for physics teaching experiments, comprising a base plate, wherein symmetrically distributed sliding grooves are provided on the upper end of the base plate, a measuring body is slidably connected to the left end of the sliding groove, and a reflective baffle is slidably connected to the right end of the sliding groove.

[0008] Preferably, an anti-deviation mechanism is fixedly installed between the lower end of the measuring body and the sliding groove. The measuring body slides inside the sliding groove, and the anti-deviation mechanism can prevent the measuring body from deviating.

[0009] Preferably, the anti-deviation mechanism includes: a sliding plate, with sliding rods slidably connected to both the left and right ends of the sliding plate, a return spring fixedly installed between the sliding rods, and a connecting rod fixedly installed on the opposite sides of the two sliding rods. The lower end of the connecting rod is rotatably connected to a rolling wheel between itself and the sliding groove. When the measuring body moves on the base plate, it drives the sliding plate to move together. The sliding plate, in conjunction with the sliding rods, drives the rolling wheel to slide inside the sliding groove. The sliding of the rolling wheel inside the sliding groove ensures the stability of the measuring body during movement and prevents it from deviating, thus avoiding deviation of the sound waves generated by the ultrasonic device.

[0010] Preferably, a support rod is fixedly installed between the lower end of the measuring body and the sliding plate, and an ultrasonic device is fixedly installed on the end face of the measuring body facing the reflective baffle. The design of the support rod allows the measuring body to be lifted off the table, avoiding the influence of the sound transmission effect of solid medium on the measurement results.

[0011] Preferably, a limiting mechanism is fixedly installed at the lower end of the reflective baffle, and the limiting mechanism and the sliding groove are slidably connected.

[0012] Preferably, the limiting mechanism includes: a movable plate, with fixed rods fixedly installed at both the front and rear ends of the movable plate, and limiting rods provided on the back sides of the two fixed rods. Limiting grooves corresponding to the limiting rods are opened on the front and rear end walls of the base plate. Before measurement, the reflective baffle needs to be moved and adjusted. After being moved to a suitable position, the reflective baffle needs to be fixed. The limiting rods on the fixed rods can be inserted into the limiting grooves to achieve a stable fixing effect.

[0013] Preferably, the lower end of the base plate is fixedly equipped with symmetrically distributed sleeve plates, and the inside of the sleeve plates is slidably connected to a lifting plate. Both the front and rear ends of the lifting plate are rotatably connected to a pair of guide wheels. By sliding the guide wheels inside the sleeve plates, the effect of convenient movement is achieved.

[0014] Preferably, the guide wheel's sleeves are slidably connected.

[0015] Preferably, an adjusting rod is rotatably connected to the end face of the lifting plate at both ends and between a pair of guide wheels on the same side. A toothed plate is fixedly installed on the end face of the sleeve plate corresponding to the adjusting rod. The adjusting rod and the toothed plate are meshed together. By rotating the adjusting rod, the adjusting rod can rotate up or down on the toothed plate. When the adjusting rod rotates up, it can drive the lifting plate to move upward inside the sleeve plate, thereby achieving the effect of raising the base plate. The height of both sides can be kept consistent by rotating the adjusting rod a certain number of times.

[0016] Preferably, the adjusting rod can move up and down inside the sleeve.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides a sound velocity measuring instrument for physics teaching experiments, which has the following beneficial effects:

[0019] 1. The sound velocity measuring instrument used in physics teaching experiments moves along with a sliding plate when the measuring body moves on the base plate. The sliding plate, in conjunction with the sliding rod, drives the rolling wheel to slide inside the sliding groove. The sliding of the rolling wheel inside the sliding groove ensures the stability of the measuring body during movement and prevents it from shifting, thus avoiding deviation of the sound waves generated by the ultrasonic device.

[0020] 2. This sound velocity measuring instrument used in physics teaching experiments has a support rod design that allows the measuring body to be lifted off the table, avoiding the influence of solid medium on the measurement results due to the better sound transmission effect.

[0021] 3. The sound velocity measuring instrument used in physics teaching experiments requires the reflective baffle to be moved and adjusted before measurement. After being moved to the appropriate position, the reflective baffle needs to be fixed. The limiting rod on the fixing rod can be inserted into the limiting groove to achieve a stable fixing effect.

[0022] 4. The sound velocity measuring instrument used in physics teaching experiments achieves convenient movement by having guide wheels slide inside the sleeve.

[0023] 5. This sound velocity measuring instrument used in physics teaching experiments can raise or lower the toothed plate by rotating the adjusting rod. When the adjusting rod rotates upward, it can drive the lifting plate to move upward inside the sleeve plate, thereby raising the base plate. The height of both sides can be kept consistent by rotating the adjusting rod a certain number of times. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0025] Figure 2 These are three-dimensional schematic diagrams of the overall structure of the present invention from different angles;

[0026] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of structure A in the middle;

[0027] Figure 4 This is a schematic diagram of the anti-deviation mechanism of the present invention;

[0028] Figure 5 This is a three-dimensional schematic diagram of the sleeve structure of the present invention;

[0029] Figure 6This is a schematic cross-sectional view of the internal structure of the sleeve plate of the present invention.

[0030] In the diagram: 1. Base plate; 2. Sliding groove; 3. Measuring body; 4. Reflective baffle; 5. Anti-deviation mechanism; 51. Sliding plate; 52. Sliding rod; 53. Return spring; 54. Connecting rod; 55. Rolling wheel; 6. Support rod; 7. Ultrasonic device; 8. Limiting mechanism; 81. Moving plate; 82. Fixed rod; 83. Limiting rod; 84. Limiting groove; 9. Sleeve plate; 10. Lifting plate; 11. Guide wheel; 12. Adjusting rod; 13. Toothed plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-6 A sound velocity measuring instrument for physics teaching experiments includes a base plate 1, with symmetrically distributed sliding grooves 2 on the upper end of the base plate 1. A measuring body 3 is slidably connected to the left end of the sliding groove 2, and a reflective baffle 4 is slidably connected to the right end of the sliding groove 2.

[0033] Please see Figure 1-2 An anti-deviation mechanism 5 is fixedly installed between the lower end of the measuring body 3 and the sliding groove 2. The measuring body 3 slides inside the sliding groove 2, and the anti-deviation mechanism 5 can prevent the measuring body 3 from deviating.

[0034] Please see Figure 1-4 The anti-deviation mechanism 5 includes: a sliding plate 51, with sliding rods 52 slidably connected to both the left and right ends of the sliding plate 51, and a return spring 53 fixedly installed between the sliding rods 52. A connecting rod 54 is fixedly installed on the opposite sides of the two sliding rods 52. The lower end of the connecting rod 54 is rotatably connected to the rolling wheel 55 between the sliding groove 2 and the measuring body 3. When the measuring body 3 moves on the base plate 1, it drives the sliding plate 51 to move together. The sliding plate 51, in conjunction with the sliding rods 52, drives the rolling wheel 55 to slide inside the sliding groove 2. The sliding of the rolling wheel 55 inside the sliding groove 2 ensures the stability of the measuring body 3 during the movement process and prevents it from deviating, thus preventing the sound waves generated by the ultrasonic device 7 from being deflected.

[0035] Please see Figure 1-3A support rod 6 is fixedly installed between the lower end of the measuring body 3 and the sliding plate 51. An ultrasonic device 7 is fixedly installed on the end face of the measuring body 3 facing the reflective baffle 4. The design of the support rod 6 allows the measuring body 3 to be lifted off the table, avoiding the influence of solid medium on the measurement results.

[0036] Please see Figure 3 A limiting mechanism 8 is fixedly installed at the lower end of the reflective baffle 4, and the limiting mechanism 8 is slidably connected to the sliding groove 2.

[0037] Please see Figure 1-3 The limiting mechanism 8 includes: a movable plate 81, with fixed rods 82 fixedly installed at both the front and rear ends of the movable plate 81. Limiting rods 83 are provided on the back side of the two fixed rods 82. Limiting grooves 84 corresponding to the limiting rods 83 are opened on the front and rear end walls of the base plate 1. Before measurement, the reflective baffle 4 needs to be moved and adjusted. After it is moved to the appropriate position, the reflective baffle 4 needs to be fixed. The limiting rods 83 on the fixed rods 82 can be inserted into the limiting grooves 84 to achieve a stable fixing effect.

[0038] Please see Figure 5 and 6 A symmetrically distributed sleeve plate 9 is fixedly installed at the lower end of the base plate 1. A lifting plate 10 is slidably connected inside the sleeve plate 9. A pair of guide wheels 11 are rotatably connected at both the front and rear ends of the lifting plate 10. The guide wheels 11 slide inside the sleeve plate 9, achieving the effect of convenient movement.

[0039] Please see Figure 5 The guide wheel 11 is slidably connected to the sleeve plate 9.

[0040] Please see Figure 5 and 6 An adjusting rod 12 is rotatably connected to the front and rear ends of the lifting plate 10 and to the end face between a pair of guide wheels 11 on the same side. A toothed plate 13 is fixedly installed on the end face of the sleeve plate 9 corresponding to the adjusting rod 12. The adjusting rod 12 and the toothed plate 13 are meshed together. By rotating the adjusting rod 12, the adjusting rod 12 can rotate and rise or fall on the toothed plate 13. When the adjusting rod 12 rotates and rises, it can drive the lifting plate 10 to move upward inside the sleeve plate 9, thereby achieving the effect of raising the base plate 1. The height of both sides can be kept consistent by rotating the adjusting rod 12 a certain number of times.

[0041] Please see Figure 5 and 6 The adjusting rod 12 can move up and down inside the sleeve 9.

[0042] In use, this sound velocity measuring instrument for physics teaching experiments moves the measuring body 3 on the base plate 1, causing the sliding plate 51 to move along with it. The sliding plate 51, in conjunction with the sliding rod 52, drives the rolling wheel 55 to slide inside the sliding groove 2. The sliding of the rolling wheel 55 inside the sliding groove 2 ensures the stability of the measuring body 3 during movement, preventing it from shifting and causing the sound waves generated by the ultrasonic device 7 to deviate. The design of the support rod 6 allows the measuring body 3 to be lifted off the table, avoiding the influence of the solid medium's better sound propagation effect on the measurement results. Before measurement, the reflector needs to be adjusted. The plate 4 is moved and adjusted. After it is moved to the appropriate position, the reflective baffle 4 needs to be fixed. The limiting rod 83 on the fixing rod 82 can be inserted into the limiting groove 84 to achieve a stable fixing effect. The guide wheel 11 slides inside the sleeve plate 9 to facilitate movement. When the adjusting rod 12 is rotated, it can rotate up or down on the toothed plate 13. When the adjusting rod 12 rotates up, it can drive the lifting plate 10 to move upward inside the sleeve plate 9, thereby raising the base plate 1. The height of both sides can be kept consistent by rotating the adjusting rod 12 a certain number of times.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sound velocity measuring instrument for physics teaching experiments, comprising a base plate (1), characterized in that: The base plate (1) has symmetrically distributed sliding grooves (2) on its upper end. The left end of the sliding groove (2) is slidably connected to the measuring body (3), and the right end of the sliding groove (2) is slidably connected to the reflective baffle (4). The anti-deviation mechanism (5) includes: a sliding plate (51), with sliding rods (52) slidably connected to both the left and right ends inside the sliding plate (51), a return spring (53) fixedly installed between the sliding rods (52), and a connecting rod (54) fixedly installed on the opposite sides of the two sliding rods (52). The lower end of the connecting rod (54) is rotatably connected to the sliding groove (2) and a rolling wheel (55). The lower end of the reflective baffle (4) is fixedly installed with a limiting mechanism (8), and the limiting mechanism (8) and the sliding groove (2) are slidably connected. The limiting mechanism (8) includes: a movable plate (81), with fixed rods (82) fixedly installed at both the front and rear ends of the movable plate (81), and limiting rods (83) provided on the back side of the two fixed rods (82), and limiting grooves (84) corresponding to the limiting rods (83) opened on the front and rear end walls of the base plate (1). The bottom plate (1) is fixedly installed with symmetrically distributed sleeve plates (9), and a lifting plate (10) is slidably connected inside the sleeve plate (9). A pair of guide wheels (11) are rotatably connected to both the front and rear ends of the lifting plate (10).

2. The sound velocity measuring instrument for physics teaching experiments according to claim 1, characterized in that: An anti-deviation mechanism (5) is fixedly installed between the lower end of the measuring body (3) and the sliding groove (2).

3. The sound velocity measuring instrument for physics teaching experiments according to claim 1, characterized in that: A support rod (6) is fixedly installed between the lower end of the measuring body (3) and the sliding plate (51), and an ultrasonic device (7) is fixedly installed on the end face of the measuring body (3) opposite to the reflective baffle (4).

4. The sound velocity measuring instrument for physics teaching experiments according to claim 1, characterized in that: The guide wheel (11) is slidably connected to the sleeve (9).

5. The sound velocity measuring instrument for physics teaching experiments according to claim 4, characterized in that: Adjusting rods (12) are rotatably connected to the front and rear ends of the lifting plate (10) and between a pair of guide wheels (11) on the same side. A toothed plate (13) is fixedly installed on the end face of the sleeve plate (9) corresponding to the adjusting rod (12). The adjusting rod (12) and the toothed plate (13) are meshed together.

6. The sound velocity measuring instrument for physics teaching experiments according to claim 5, characterized in that: The adjusting rod (12) can move up and down inside the sleeve (9).

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