Experimental platform for audible sound wave research

Abstract

The utility model relates to the technical field of audible sound wave experimental platforms, in particular to an experimental platform for audible sound wave research, which comprises an audible sound velocity tester, a digital oscilloscope, a signal acquisition module, a display and a PID (proportion integration differentiation) temperature controller. One end of the vernier caliper is provided with a synchronous moving device, the other end of the vernier caliper is provided with a reflecting plate type photoelectric sensor, the other end of the double-layer sealing pipe is internally provided with a loudspeaker, one side of the reflecting plate type photoelectric sensor is provided with a temperature sensor, and the double-layer sealing pipe is connected with a PID temperature controller. Compared with the prior art, the utility model has the advantages that the double-layer sealing pipe has strong expansibility and universality, the noise is low during the experiment, and the double-layer sealing pipe does not influence each other; the intuition is high; the signal frequency of the transmitting end is continuously adjustable, and the stability of transmitting single-frequency sound waves is high; the signal receiving end device adopts a synchronous belt transmission structure, and transmission is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of audible sound wave experimental platforms, and specifically refers to an experimental platform for audible sound wave research. Background Art

[0002] Acoustics is an important branch of physics. By studying acoustics content, the characteristics of the propagation medium and related state information can be obtained, which is of great significance in aspects such as sound wave positioning, flaw detection, ranging, measuring liquid flow velocity, measuring the elastic modulus of materials, measuring gas temperature, and measuring gas pressure. According to the training plan, the laboratory acoustics experiment is a class A experiment. However, at present, the acoustic experiment instruments and devices are simple, and the teaching content that can be realized is single, unable to meet the needs of cultivating top-notch innovative talents and subject improvement.

[0003] In view of the above technical problems, this application proposes an experimental platform for audible sound wave research that can meet the basic requirements of sound speed measurement and the needs of students at different levels to carry out extended content in acoustics. Content of the Utility Model

[0004] I. Technical Problems to be Solved

[0005] The technical problem to be solved by the utility model is that at present, the acoustic experiment instruments and devices are simple, and the teaching content that can be realized is single, unable to meet the needs of cultivating top-notch innovative talents and subject improvement.

[0006] II. Technical Solution

[0007] To solve the above technical problems, the technical solution provided by the utility model is: an experimental platform for audible sound wave research, including an audible sound speed measuring instrument, a digital oscilloscope, a signal acquisition module, a display, and a PID temperature controller. A double-layer sealed tube is installed on the upper side of the audible sound speed measuring instrument. A vernier caliper slides through one end of the double-layer sealed tube. A synchronous moving device is installed at one end of the vernier caliper located outside the double-layer sealed tube. A reflective photoelectric sensor is installed at the other end of the vernier caliper. A loudspeaker is installed inside the other end of the double-layer sealed tube. A temperature sensor is installed on the side of the reflective photoelectric sensor close to the loudspeaker. The double-layer sealed tube is connected to the PID temperature controller.

[0008] As an improvement, the double-layer sealed tube includes an outer sound insulation tube and an inner sound insulation tube. Positioning sleeves are respectively installed inside both ends of the outer sound insulation tube and outside both ends of the inner sound insulation tube. Sound insulation covers are respectively installed outside both ends of the outer sound insulation tube. A through hole for the vernier caliper to pass through is provided on a group of the sound insulation covers.

[0009] As an improvement, a heating coil is evenly wound around the outer wall of the inner sound insulation pipe. One end of the heating coil is equipped with a heating input terminal, and the heating input terminal is connected to the heating output terminal of the PID temperature controller. A temperature output terminal is installed on the sound insulation cover, and the temperature output terminal is connected to the temperature detection and receiving terminal of the PID temperature controller.

[0010] As an improvement, a second sound insulation cover is installed inside the end of the inner sound insulation pipe away from the vernier caliper, and the loudspeaker is installed on the side of the second sound insulation cover close to the vernier caliper.

[0011] As an improvement, a sealing gasket is provided between the sound insulation cover and the end of the outer sound insulation pipe.

[0012] As an improvement, the signal output terminal and the test terminal of the audible sound speed measuring instrument are respectively connected to the signal access terminal and the signal output terminal of the digital oscilloscope through wires.

[0013] As an improvement, the signal output terminal of the audible sound speed measuring instrument is connected to the input terminal of the signal acquisition module through a wire, and the output terminal of the signal acquisition module is connected to the display.

[0014] III. Beneficial effects

[0015] The advantages of the present utility model compared with the prior art are as follows:

[0016] 1. The double-layer sealed pipe has strong expandability and versatility and can be used for the measurement of acoustics, thermotics, and Doppler effect; the double-layer sealed pipe adopts a double-layer glass cylinder closed design, with less noise during experiments and no mutual interference.

[0017] 2. It has strong intuitiveness, and the existence of sound waves can be felt; the signal frequency at the transmitting end is continuously adjustable, and the stability of transmitting single-frequency sound waves is strong; the signal receiving end device adopts a synchronous belt drive structure, with stable and reliable transmission; the experimental content meets the requirements of hierarchical and personalized exploration of acoustic experiments, providing an experimental basis for scientific research and subject competitions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the experimental device of an experimental platform for audible sound wave research of the present utility model.

[0019] Figure 2 is an exploded view of the double-layer sealed pipe of an experimental platform for audible sound wave research of the present utility model.

[0020] Figure 3 is a schematic structural diagram of the double-layer sealed pipe of an experimental platform for audible sound wave research of the present utility model.

[0021] As shown in the figure: 1. Audible sound speed measuring instrument; 2. Double-layer sealed tube; 201. Outer sound insulation tube; 202. Inner sound insulation tube; 203. Heating coil; 204. Positioning sleeve; 205. Second sound insulation cover; 206. Sound insulation cover; 207. Sealing gasket; 208. Through hole; 3. Speaker; 4. Reflective plate photoelectric sensor; 5. Temperature sensor; 6. Vernier caliper; 7. Synchronous moving device; 8. Heating input terminal; 9. Temperature output terminal; 10. PID temperature controller; 11. Digital oscilloscope; 12. Signal acquisition module; 13. Display. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment 1

[0024] As shown in the attached Figure 1 figure, an experimental platform for audible sound wave research includes an audible sound speed measuring instrument 1, a digital oscilloscope 11, a signal acquisition module 12, a display 13, and a PID temperature controller 10. A double-layer sealed tube 2 is installed on the upper side of the audible sound speed measuring instrument 1. A vernier caliper 6 slides through one end of the double-layer sealed tube 2. A synchronous moving device 7 is installed at one end of the vernier caliper 6 outside the double-layer sealed tube 2. A reflective plate photoelectric sensor 4 is installed at the other end of the vernier caliper 6. A speaker 3 is installed inside the other end of the double-layer sealed tube 2. A temperature sensor 5 is installed on the side of the reflective plate photoelectric sensor 4 close to the speaker 3. The double-layer sealed tube 2 is connected to the PID temperature controller 10.

[0025] With the above structure, the adjustable frequency of the speaker 3 is: 0 - 5KHZ, the voltage is 50HZ sinusoidal alternating current, and there is no breakdown and arcing phenomenon in the equipment under 1500V power-on for 1 minute, and the insulation resistance > 5MΩ. The sound generation frequency is adjusted through the speaker 3. The reflective plate photoelectric sensor 4 detects the sound pressure values at various points in the space inside the double-layer sealed tube 2, and the corresponding position is read by the vernier caliper 6 at the same time. The vernier caliper 6 drives the synchronous moving device 7 to move, and the synchronous moving device 7 drives the measuring components inside the audible sound speed measuring instrument 1 to move. The audible sound speed measuring instrument 1 transmits the data to the signal acquisition module 12 for analysis, and the data acquisition curve is displayed through the display 13. The specific structure is as follows:

[0026] Combined with the attached Figure 2 and the attached Figure 3As shown, the double-layer sealed tube 2 includes an outer sound insulation tube 201 and an inner sound insulation tube 202. Positioning sleeves 204 are respectively installed inside both ends of the outer sound insulation tube 201 and outside both ends of the inner sound insulation tube 202. Sound insulation covers 206 are respectively installed outside both ends of the outer sound insulation tube 201. A through hole 208 for the vernier caliper 6 to pass through is provided on a group of the sound insulation covers 206. A sealing gasket 207 is provided between the sound insulation cover 206 and the end of the outer sound insulation tube 201.

[0027] With the above structure, the two ends of the inner sound insulation tube 202 are sleeved with positioning sleeves 204 and fixedly installed inside the outer sound insulation tube 201. Through the sound insulation covers 206 and the sealing gaskets 207 at both ends of the outer sound insulation tube 201, the inside of the outer sound insulation tube 201 and the inner sound insulation tube 202 is in a sealed state, and the vernier caliper 6 passes through the sound insulation cover 206 in a sealed manner.

[0028] Combined with the attached Figure 1 and the attached Figure 2 As shown, a heating coil 203 is evenly wound around the outer wall of the inner sound insulation tube 202. One end of the heating coil 203 is equipped with a heating input terminal 8. The heating input terminal 8 is connected to the heating output terminal of the PID temperature controller 10. A temperature output terminal 9 is installed on the sound insulation cover 206. The temperature output terminal 9 is connected to the temperature detection and receiving terminal of the PID temperature controller 10;

[0029] A second sound insulation cover 205 is installed inside one end of the inner sound insulation tube 202 away from the vernier caliper 6. The speaker 3 is installed on one side of the second sound insulation cover 205 close to the vernier caliper 6.

[0030] With the above structure, the heating output terminal of the PID temperature controller 10 sends a heating signal to the heating input terminal 8. The heating coil 203 is controlled to heat through the heating input terminal 8. The temperature inside the double-layer sealed tube 2 is detected by the temperature sensor 5 and the temperature data is transmitted to the temperature output terminal 9. The temperature data is conveyed to the PID temperature controller 10 through the temperature output terminal 9 for final temperature monitoring;

[0031] By installing the second sound insulation cover 205 inside the inner sound insulation tube 202, it is convenient to install the speaker 3 inside the inner sound insulation tube 202.

[0032] Combined with the attached Figure 1 As shown, the signal output terminal and the test terminal of the audible sound speed measuring instrument 1 are respectively connected to the signal access terminal and the signal output terminal of the digital oscilloscope 11 through wires. The signal output terminal of the audible sound speed measuring instrument 1 is connected to the input terminal of the signal acquisition module 12 through a wire. The output terminal of the signal acquisition module 12 is connected to the display 13.

[0033] Through the above structure, the data transmitted by the synchronous moving device 7 in the audible sound speed measuring instrument 1 is collected, and the data is transmitted from the signal output end to the signal access end of the digital oscilloscope 11 through a wire to the digital oscilloscope 11. The data is processed and displayed by the digital oscilloscope 11. The signal output end of the digital oscilloscope 11 is connected to the signal acquisition module 12 through the test end of the audible sound speed measuring instrument 1. The waveform data processed in the digital oscilloscope 11 is transmitted to the signal acquisition module 12 and displayed through the display 13 connected to the signal acquisition module 12.

[0034] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0036] The above describes the present invention and its implementation manners. Such a description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. An experimental platform for audible sound wave research, comprising an audible sound velocity measuring instrument (1), a digital oscilloscope (11), a signal acquisition module (12), a display (13) and a PID temperature controller (10), characterized in that: A double-layer sealed tube (2) is installed on the upper side of the audible sound velocity measuring instrument (1); a vernier caliper (6) is slidably passed through one end of the double-layer sealed tube (2); a synchronous moving device (7) is installed at one end of the vernier caliper (6) located outside the double-layer sealed tube (2); a reflective plate type photoelectric sensor (4) is installed at the other end of the vernier caliper (6); a loudspeaker (3) is installed inside the other end of the double-layer sealed tube (2); a temperature sensor (5) is installed on the side of the reflective plate type photoelectric sensor (4) close to the loudspeaker (3); and the double-layer sealed tube (2) is connected to a PID temperature controller (10).

2. The experimental platform for audible sound wave research according to claim 1, characterized in that: The double-layer sealed tube (2) comprises an outer soundproof tube (201) and an inner soundproof tube (202); positioning sleeves (204) are respectively installed inside both ends of the outer soundproof tube (201) and outside both ends of the inner soundproof tube (202); soundproof covers (206) are respectively installed outside both ends of the outer soundproof tube (201); and a set of the soundproof covers (206) is provided with a through hole (208) for a vernier caliper (6) to pass through.

3. The experimental platform for audible sound wave research according to claim 2, characterized in that: The outer wall of the inner sound insulation tube (202) is evenly wound with a heating coil (203); one end of the heating coil (203) is provided with a heating input end (8); the heating input end (8) is connected to a heating output end of a PID temperature controller (10); a temperature output end (9) is provided on the sound insulation cover (206); the temperature output end (9) is connected to a temperature detection receiving end of the PID temperature controller (10).

4. The experimental platform for audible sound wave research according to claim 2, characterized in that: A second sound insulation cover (205) is installed inside the end of the inner sound insulation tube (202) away from the vernier caliper (6), and the speaker (3) is installed on a side of the second sound insulation cover (205) close to the vernier caliper (6).

5. The experimental platform for audible sound wave research according to claim 2, characterized in that: A sealing gasket (207) is provided between the sound insulation cover (206) and the end of the outer sound insulation tube (201).

6. The experimental platform for audible sound wave research according to claim 1, characterized in that: The signal output terminal and the test terminal of the audible sound velocity measuring instrument (1) are respectively connected to the signal input terminal and the signal output terminal of the digital oscilloscope (11) by means of wires.

7. The experimental platform for audible sound wave research according to claim 1, characterized in that: The signal output end of the audible sound velocity measuring instrument (1) is connected to the input end of the signal acquisition module (12) through a wire, and the output end of the signal acquisition module (12) is connected to the display (13).

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