Sound velocity measuring instrument for physical experiment

Abstract

A sound velocity measuring instrument for physical experiments disclosed by the present invention comprises a measuring instrument host and a measurement placement base arranged at the left side of the measuring instrument host, a hollow support rod is arranged at the center of the top end of the measurement placement base, and a sound velocity measurement receiver is arranged at the top end of the hollow support rod. Receiving holes are densely distributed in the front end of the sound velocity measurement receiver, a stable position adjusting device is arranged at the bottom end of the measurement placement base, the novel stable position adjusting device is additionally arranged at the bottom end of the measurement placement base, and the position of the measurement placement base can be adjusted through the stable position adjusting device; in this way, the sound velocity measurement receiver can be driven to perform position adjustment synchronously, so that the sound velocity measurement receiver can be accurately adjusted to a position required by an experiment, and the situation that the sound velocity measurement receiver receives signals inaccurately due to the fact that the measurement placement base is placed at an improper position on an experiment platform is avoided. And the precision and the accuracy of sound velocity measurement are greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field related to physical experiment instruments, and particularly relates to a sound velocity measuring instrument for physical experiments. Background Art

[0002] In modern physical experiments, the measurement of sound velocity is an important experimental content. With the continuous development of science and technology, the requirements for the accuracy and stability of sound velocity measuring instruments are getting higher and higher. In traditional sound velocity measurement methods, there are some limitations and problems. For example, in some relatively complex experimental environments, the propagation of sound waves will be interfered by various factors. Changes in environmental factors such as temperature, humidity, and air pressure will have a certain impact on the measurement results of sound velocity;

[0003] In addition, when the energy of the measured sound wave is relatively large, the strong sound wave hitting the sound velocity measurement receiver will easily cause the measurement placement base to shake, and then the sound velocity measurement receiver will shake. This kind of shaking will destroy the stability of the measurement system, cause changes in the position and angle of sound wave reception, and thus seriously affect the accuracy and reliability of the measurement results of sound velocity. To solve these problems, there is an urgent need for a new sound velocity measuring instrument to improve the measurement accuracy and stability, be able to accurately measure the sound velocity in a complex experimental environment, and avoid interference and errors to the measurement results caused by external factors (such as the base shaking caused by sound wave impact). Therefore, the research and development of this sound velocity measuring instrument for physical experiments is precisely to meet this need. By optimizing the design of each component of the measuring instrument, such as setting a stable adjustment device and adopting a suitable support structure, the anti-interference ability and stability of the instrument are enhanced to ensure accurate sound velocity measurement under various experimental conditions. Summary of the Invention

[0004] The purpose of the present invention is to provide a sound velocity measuring instrument for physical experiments to solve the problem that when the energy of the measured sound wave is relatively large, the strong sound wave hitting the sound velocity measurement receiver will easily cause the measurement placement base to shake, and then the sound velocity measurement receiver will shake. This kind of shaking will destroy the stability of the measurement system, cause changes in the position and angle of sound wave reception, and thus seriously affect the accuracy and reliability of the measurement results of sound velocity as mentioned in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A sound velocity measuring instrument for physical experiments, including a measuring instrument main body and a measurement placement base arranged on the left side of the measuring instrument main body. A hollow support rod is arranged at the center of the top end of the measurement placement base, and a sound velocity measurement receiver is arranged at the top end of the hollow support rod. The front end interior of the sound velocity measurement receiver is densely distributed with receiving holes, and a stable adjustment device is arranged at the bottom end of the measurement placement base.

[0006] Preferably, the stable position adjustment device includes a T-shaped position adjustment chute, a T-shaped position adjustment track, an anti-slip bottom pad, and a track bottom plate. Inside the center of the lower half of the measurement placement base, there is a T-shaped position adjustment chute which is horizontally arranged inside the measurement placement base. At the bottom of the measurement placement base, there is a track bottom plate. On the outer wall of the bottom end of the track bottom plate, there is an anti-slip bottom pad. At the center of the top end of the track bottom plate, there is a T-shaped position adjustment track which is horizontally arranged on the top end of the track bottom plate. The T-shaped position adjustment chute is sleeved outside the T-shaped position adjustment track.

[0007] Preferably, the stable position adjustment device further includes a locking block and a locking screw. On the outer wall of the left end of the measurement placement base, there is a fixed locking block which is located above the T-shaped position adjustment chute. At the center of the locking block, there is a locking screw inserted by threading.

[0008] Preferably, after the locking screw is tightened, the bottom end of the screw rod can tightly press on the outer wall of the top end of the T-shaped position adjustment track. The T-shaped position adjustment chute can slide left and right outside the T-shaped position adjustment track. The anti-slip bottom pad is made of soft rubber.

[0009] Preferably, at the front end of the measuring instrument main body, there is a main body panel. Inside the center of the left side of the front end of the main body panel, there is a data connection hole. Inside the center of the right side of the top end of the measurement placement base, there is also a data connection hole. Between the two data connection holes, there is an electrically connected data connection wire.

[0010] Preferably, at the rear end of the measuring instrument main body, there is a main body back panel. Both the main body panel and the main body back panel are fixedly connected to the measuring instrument main body through multiple embedded screws. Inside the center of the main body back panel, there is also a heat dissipation fan, and the main part of the heat dissipation fan is located inside the rear end of the measuring instrument main body.

[0011] Preferably, inside the center of the front end of the main body panel, there is a data display screen. On the right side of the data display screen, there are multiple control buttons, and the control buttons are physical pressing type buttons.

[0012] Preferably, the left and right ends and the outer part of the rear end of the measuring instrument main body are sleeved with a U-shaped portable handle. At both left and right ends of the opening of the U-shaped portable handle, they are respectively rotationally connected to the outer walls of the left and right ends of the measuring instrument main body through knob-type screws. The U-shaped portable handle can rotate clockwise and counterclockwise outside the measuring instrument main body through the knob-type screws.

[0013] Compared with the prior art, the present invention provides a sound speed measuring instrument for physical experiments, having the following

[0014] Beneficial effects:

[0015] In the present invention, a novel stable positioning device is added at the bottom end of the measurement placement base. The measurement placement base can be adjusted in position through the stable positioning device, which can drive the sound velocity measurement receiver to be adjusted synchronously, enabling the sound velocity measurement receiver to be accurately adjusted to the position required for the experiment. This avoids the situation where the signal received by the sound velocity measurement receiver is inaccurate due to improper placement of the measurement placement base on the experimental platform, greatly improving the accuracy and precision of sound velocity measurement. At the same time, the cooperative design of the T-shaped positioning chute and the T-shaped positioning track in the stable positioning device can achieve smooth sliding of the measurement placement base in the horizontal direction, with simple operation and a smooth sliding process. The setting of the locking block and the locking screw can firmly lock the measurement placement base in the required position after adjusting the position, preventing the measurement placement base from shifting due to external factors during the experiment, ensuring the continuity and stability of the sound velocity measurement process, and ensuring the reliability and repeatability of experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a side perspective structural schematic diagram of a sound velocity measuring instrument for a physics experiment according to the present invention.

[0017] Figure 2 FIG. is a front view planar structural schematic diagram of a sound velocity measuring instrument for a physics experiment according to the present invention.

[0018] Figure 3 FIG. is a single independent three-dimensional structural schematic diagram of the main body of the measuring instrument according to the present invention.

[0019] Figure 4 FIG. is a side perspective structural schematic diagram of the stable positioning device according to the present invention.

[0020] Figure 5 FIG. is a front view planar structural schematic diagram of the stable positioning device according to the present invention.

[0021] In the figures: 1, main body of the measuring instrument; 2, data connection wire; 3, stable positioning device; 4, measurement placement base; 5, hollow support rod; 6, sound velocity measurement receiver; 7, receiving hole; 8, U-shaped portable handle; 9, back panel of the main body; 10, data connection hole; 11, data display screen; 12, front panel of the main body; 13, control button; 14, T-shaped positioning chute; 15, T-shaped positioning track; 16, anti-slip bottom pad; 17, track bottom plate; 18, locking block; 19, locking screw. DETAILED DESCRIPTION OF THE INVENTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] The present invention provides a sound velocity measuring instrument for physical experiments as Figures 1-5 shown, which includes a measuring instrument main body 1 and a measuring placement base 4 arranged on the left side of the measuring instrument main body 1. The measuring instrument main body 1 is the core control part of the entire sound velocity measuring instrument, responsible for receiving the electrical signals transmitted by the sound velocity measuring receiver 6, and analyzing and calculating the signals to obtain the specific value of the sound velocity. At the center of the top of the measuring placement base 4, there is a hollow support rod 5. At the top of the hollow support rod 5, there is a sound velocity measuring receiver 6. Inside the front end of the sound velocity measuring receiver 6, there are densely arranged receiving holes 7. The sound velocity measuring receiver 6 is a key component for receiving sound waves. The densely arranged receiving holes 7 at the front end can widely receive sound waves from the surrounding space, convert the sound wave signals into electrical signals, and transmit the electrical signals to the measuring instrument main body 1 through the data connection wire 2 for subsequent analysis and calculation, thereby realizing the measurement of the sound velocity. The sound velocity measurement principle of this sound velocity measuring instrument for physical experiments is mainly based on the propagation characteristics of sound waves in a medium. In this sound velocity measuring instrument for physical experiments, when the sound generating device emits sound waves, the sound waves will propagate to the surrounding through media such as air. The densely arranged receiving holes 7 at the front end of the sound velocity measuring receiver 6 can receive sound waves from all directions. After the sound velocity measuring receiver 6 receives the sound waves, it converts the sound wave signals into electrical signals and transmits the electrical signals to the inside of the measuring instrument main body 1 through the data connection wire 2 for processing. The circuit system inside the measuring instrument main body 1 will analyze and calculate the received electrical signals, and use the known signal propagation time and propagation distance to calculate the sound velocity. During the experiment, by adjusting the position of the measuring placement base 4, the distance between the sound velocity measuring receiver 6 and the sound generating device can be changed, so as to measure the time required for sound waves to propagate at different distances, and then the specific value of the sound velocity in different media can be calculated according to the special formula.

[0024] As Figure 1 、 Figure 2 and Figure 3As shown in the figure, a mainframe panel 12 is provided at the front end of the sound velocity measuring instrument mainframe 1. Inside the left side at the center of the front end of the mainframe panel 12, a data connection hole 10 is provided. Inside the right side at the center of the top end of the measurement placement base 4, a data connection hole 10 is also provided. A data connection wire 2 is electrically connected between the two data connection holes 10. The data connection wire 2 serves as a bridge connecting the sound velocity measurement receiver 6 and the sound velocity measuring instrument mainframe 1, accurately transmitting the electrical signal converted by the sound velocity measurement receiver 6 into the sound velocity measuring instrument mainframe 1, enabling the sound velocity measuring instrument mainframe 1 to receive a complete sound wave signal and perform subsequent processing and calculations, thereby completing the sound velocity measurement work. A mainframe backplane 9 is provided at the rear end of the sound velocity measuring instrument mainframe 1. Both the mainframe panel 12 and the mainframe backplane 9 are fixedly connected to the sound velocity measuring instrument mainframe 1 through a plurality of embedded screws. Inside the center of the mainframe backplane 9, a cooling fan is also provided, and the main part of the cooling fan is located inside the rear end of the sound velocity measuring instrument mainframe 1. The setting of the cooling fan is to ensure that the internal circuit system of the sound velocity measuring instrument mainframe 1 can maintain an appropriate temperature during long-term operation. Because the circuit system generates heat during operation, if the heat cannot be dissipated in time, it will affect the performance and lifespan of the circuit components. The cooling fan effectively reduces the temperature inside the mainframe by pumping out the hot air inside the mainframe and allowing the cold air outside to enter, forming an air circulation, ensuring that the sound velocity measuring instrument mainframe 1 can operate stably and reliably, so as to guarantee the accuracy and continuity of the sound velocity measurement process. Inside the center of the front end of the mainframe panel 12, a data display screen 11 is provided. On the right side of the data display screen 11, a plurality of control buttons 13 are provided, and the control buttons 13 are physical push buttons. U-shaped portable handles 8 are sleeved on the left and right ends and the rear end of the sound velocity measuring instrument mainframe 1. Both left and right ends of the opening of the U-shaped portable handle 8 are rotatably connected to the outer walls of the left and right ends of the sound velocity measuring instrument mainframe 1 through knob screws. The U-shaped portable handle 8 can be rotated clockwise and counterclockwise outside the sound velocity measuring instrument mainframe 1 through the knob screws. The U-shaped portable handle 8 facilitates the experimenter to carry and move the sound velocity measuring instrument during physical experiments. Through the knob screws at both left and right ends of the opening of the U-shaped portable handle 8 being rotatably connected to the outer walls of the left and right ends of the sound velocity measuring instrument mainframe 1, the handle can be rotated to a suitable position for lifting when in use, and can be rotated to the side of the sound velocity measuring instrument mainframe 1 when not in use, without affecting the placement and operation of the instrument, making it convenient for the instrument to be transferred between different experimental sites and improving the portability of the instrument.

[0025] As Figure 1 , Figure 4 and Figure 5As shown in the figure, a stable adjustment device 3 is provided at the bottom end of the measurement placement base 4. The stable adjustment device 3 includes a T-shaped adjustment chute 14, a T-shaped adjustment track 15, an anti-slip bottom pad 16, and a track bottom plate 17. Inside the center of the lower half of the measurement placement base 4, there is a T-shaped adjustment chute 14, which is horizontally arranged inside the measurement placement base 4. At the bottom of the measurement placement base 4, there is a track bottom plate 17. On the outer wall of the bottom end of the track bottom plate 17, there is an anti-slip bottom pad 16. At the center of the top end of the track bottom plate 17, there is a T-shaped adjustment track 15, which is horizontally arranged on the top end of the track bottom plate 17. The T-shaped adjustment chute 14 is sleeved outside the T-shaped adjustment track 15. Among them, the track bottom plate 17 plays a role in supporting the entire stable adjustment device 3 and fixing it at the bottom of the measurement placement base 4. The anti-slip bottom pad 16 is made of soft rubber to increase the friction between the stable adjustment device 3 and the placement plane, preventing the instrument from sliding and shifting during the experiment due to external factors (such as slight vibrations, air currents, etc.). The stable adjustment device 3 also includes a locking block 18 and a locking screw 19. The locking block 18 is fixed on the outer wall of the left end of the measurement placement base 4, and the locking block 18 is located above the T-shaped adjustment chute 14. At the center of the locking block 18, there is a locking screw 19 inserted through the thread. After the locking screw 19 is tightened, the bottom end of the screw rod can tightly press on the outer wall of the top end of the T-shaped adjustment track 15. The T-shaped adjustment chute 14 can slide left and right outside the T-shaped adjustment track 15. Such a design utilizes the guiding function of the T-shaped structure to ensure that the measurement placement base 4 can smoothly slide left and right to adjust the position in the horizontal direction. The anti-slip bottom pad 16 is made of soft rubber, and the setting of the locking block 18 and the locking screw 19 is the key part of the entire stable adjustment device 3. When it is necessary to adjust the position of the measurement placement base 4, the locking screw 19 can be loosened first. At this time, the T-shaped adjustment chute 14 can freely slide on the T-shaped adjustment track 15, facilitating the movement of the measurement placement base 4 to a suitable position. When the position is adjusted, the locking screw 19 is tightened, and the bottom end of the screw rod tightly presses on the outer wall of the top end of the T-shaped adjustment track 15. Through the friction force and the locking effect of the thread, the T-shaped adjustment chute 14 is fixed at the current position, thereby firmly locking the measurement placement base 4 at the adjusted position, ensuring that during the sound speed measurement experiment, the measurement placement base 4 will not change its position due to external factors, and guaranteeing the accuracy and stability of the sound speed measurement.

[0026] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sound velocity measuring instrument for physical experiments, comprising a measuring instrument main body (1) and a measuring placement base (4) arranged on the left side of the measuring instrument main body (1), a hollow support rod (5) is arranged at the top center of the measuring placement base (4), a sound velocity measuring receiver (6) is arranged at the top of the hollow support rod (5), and the front end of the sound velocity measuring receiver (6) is densely covered with receiving holes (7), characterized in that: The bottom end of the measuring and placing base (4) is provided with a stabilizing and adjusting device (3); The stable positioning device (3) comprises a T-shaped positioning slide groove (14), a T-shaped positioning track (15), an anti-skid bottom pad (16) and a track bottom plate (17); a T-shaped positioning slide groove (14) is arranged inside the center of the lower half of the measuring placement base (4); the T-shaped positioning slide groove (14) is arranged transversely inside the measuring placement base (4); a track bottom plate (17) is arranged at the bottom of the measuring placement base (4); an anti-skid bottom pad (16) is arranged on the outer wall of the bottom end of the track bottom plate (17); a T-shaped positioning track (15) is arranged at the center of the top end of the track bottom plate (17); the T-shaped positioning track (15) is arranged transversely at the top end of the track bottom plate (17); and the T-shaped positioning slide groove (14) is sleeved on the outside of the T-shaped positioning track (15).

2. A sound velocity measuring instrument for physical experiments according to claim 1, characterized in that: The stable positioning device (3) also includes a locking block (18) and a locking screw (19); a locking block (18) is fixed to the outer wall of the left end of the measuring and placing base (4); the locking block (18) is located on the upper side of the T-shaped positioning slot (14); and a locking screw (19) is threadedly inserted at the center of the locking block (18).

3. A sound velocity measuring instrument for physical experiments according to claim 2, characterized in that: After the locking screw (19) is tightened, the bottom end of the screw rod can be pressed tightly against the top outer wall of the T-shaped positioning track (15), and the T-shaped positioning slide groove (14) can slide left and right outside the T-shaped positioning track (15), and the anti-slip bottom pad (16) is made of soft rubber.

4. The sound velocity measuring instrument for physical experiments according to claim 1, characterized in that: The front end of the measuring instrument host (1) is provided with a host panel (12), the left interior of the front center of the host panel (12) is provided with a data connection hole (10), the right interior of the top center of the measuring placement base (4) is also provided with a data connection hole (10), and a data connection wire (2) is electrically connected between the two data connection holes (10).

5. A sound velocity measuring instrument for physical experiments according to claim 4, characterized in that: A host back plate (9) is arranged at the rear end of the measuring instrument host (1); the host panel (12) and the host back plate (9) are fixedly connected to the measuring instrument host (1) via a plurality of embedded screws; a heat dissipation fan is also arranged inside the center of the host back plate (9), and the main body of the heat dissipation fan is located inside the rear end of the measuring instrument host (1).

6. A sound velocity measuring instrument for physical experiments according to claim 4, characterized in that: A data display screen (11) is arranged inside the front center of the host panel (12), and a plurality of control buttons (13) are arranged on the right side of the data display screen (11), and the control buttons (13) are physical press-type buttons.

7. The sound velocity measuring instrument for physical experiments according to claim 1, characterized in that: The left and right ends and the rear end of the measuring instrument main body (1) are sleeved with U-shaped portable handles (8), and the left and right ends of the opening of the U-shaped portable handle (8) are rotatably connected to the left and right outer walls of the measuring instrument main body (1) respectively through knob-type screws. The U-shaped portable handle (8) can be rotated clockwise or counterclockwise on the outside of the measuring instrument main body (1) through the knob-type screws.

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